JSS 2 BASIC SCIENCE – KnowledgeMerchant

14/9/2020
Subject; Basic science
Class;JSS2
Topic;General review

Morning students, how was your night?, the Correction for the previous work is stated below and today we will continue with our general review .
Correction
1)b
2)c
3)a
4)c
5)d
6)a
7)c
8)b
9)b
10)b
General review

1)The flame cell helps in excretion in _ [a] insect [b] flat worms [c] earthworms [d] human 2)The female reproductive system include the following except [a] ovaries [b] uterus [c] cervix [d] vas deferens 3)The following are found in urine except_ [a] water [b] salt [c] uric acid [d] phosphorus
4)The cervical is made up of _ bone [a] 2 [b] 7 [c] 8 [d] 12 5)The S.I unit of power is [a] joule [b] metre [c] Neneton [d] Watts
6)Which of these is not transmittable traits from the parents to their children [a] skin colour [b] height [c] blood group [d] kwashiorkor
7)The S.I unit of work is [a] joule [b] metre [c] Neneton [d] Watts 8)Electric current is measured in __a)ampere b)voltage c)columbs d) ohms 9)stearic acid is found in [a] egg [b] yam [c] milk [d] palm oil
10) is produced in the deodenum [a] renin [b] pepsin [c] amylase [d] peptone

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7/9/2020
Subject; Basic science
Class;JSS2
Topic;General review

Morning students, how was your night?, the Correction for the previous work is stated below and today we will continue with our general review .
Correction
1)c
2)d
3)b
4)b
5)a
6)d
7)c
8)a
9)c
10)b
General review

1)Lipase brea-k——– to fatty acid and glycerol a)glucose b)lipid c)phospholipid d)glycolipid
2)——— is a crustacean a)rat b)lizard c)shrimps d)mice
3)————- is a long tube stretching from the mouth to the anus a)alimentary canal b)oesophagus c)intestine d)colon
4)———– is used by protozoan for excretion a)kidney b)green glands c)contractile vacoule d)liver

5)Insulin is produced by (a) adrenal gland (b) gonads (c) pituitary gland (d) pancreas
6.) The mode of nutrition common to green plants is (a) autotrophic (b) heterotrophic (c) holozoic (d) saprophytic.
7.) The major pollutant around airport residential area is (a)oil spillage (b)soot (c)noise (d) dust
8)The outer part of a skin is called (a)dermis (b)epidermis (c) granular (d) Malphoghan
9)Warm blood animals are called (a)poikilothermic (b)homoithermic (c) Viviparous (d) oviparous
10)__ is the hormone produced in the mammary gland (a)oxygen (b)lactin (c)thyroxin (d)insulin

3/9/2020
Subject; Basic science
Class;JSS2
Topic;General review

Morning students, how was your night?, the Correction for the previous work is stated below and today we will continue with our general review .
Correction
1)b
2)b
3)b
4)b
5)a
6)a
7)d
8)d
9)a
10)a
General review
1)————— is a collection ofcells coming together to perform specific function a)organ b)cell c)tissue d)system
2)The ultimate source of energy is ——–a)food b)animals c)plants d)sun
3)Energy in a moving body is —————a)chemical b)kinetic c)potential d)light
4)one of this is required for photosynthesis a)oxygen b)water c)carbon d)all
5)one of this is a micronutrient a)zinc b)nitrogen c)sulphur d)carbon
6)Animal require ————–type of nutrition a)holozoic b)photosynthetic c)autotrophic d)heterotrophic
7)————– is used for test of starch a)fehling b)sudan c)iodine d)million reagent
8)The process of feeding on dead and decaying organism is —————a)saprophytism b)parasitism c)symbiosis d)chemosynthesis
9)————– is responsible for blood clothing a)vit A b)vit C c)vit K D)vitB
10)protein is broken down into a)fat b)amino acid c)starch d)none

31/8/2020
Subject; Basic science
Class;JSS2
Topic;General review

Morning students, how was your night?, the Correction for the previous work is stated below and today we will continue with our general review .
Correction
1)a
2)a
3)a
4)a
5)a
6)b
7)a
8)a
9)b
10)b
General review
1)The process of separating petroleum into its components is (a) distillation (b) fractional distillation (c) sieving (d) filtration
2) is used for construction of roads (a) fuel (b) bitumen (c) paraffin (d) petrol.
3)The unit of work is (a)walt (b) joule (c) energy (d) force
4)The organ that look like a bean shape in the body is (a) liver (b)kidney (c) skin (d) mouth
5) states that all matter is made up of atoms which are naturally indivisible and indestructible (a) John Dalton (b) John Kelvin (c) Gay Lussa (d) Thompson
6)_increase the speed of a machine a) pulley b) gear c) lever d) axle 7)The following are simple machines except (a) lever (b) pulley (c) wheel (d) seesaw
8)The following are found in the hospital except———a)syringe b)needle c)drug d)cream
9)Drug abuse can result to ———–a)death b)happiness c)fatness d)heaviness
10)Artificial application of water to plant is a)irrigation b)planting c)cropping d)waterlogging

27/8/2020
Subject; Basic science
Class;JSS2
Topic;General review

Morning students, how was your night?, the Correction for the previous work is stated below and today we will continue with our general review .
Correction
1)b
2)b
3)b
4)d
5)b
6)c
7)d
8)c
9)a
10)b
General review

1)The misuse of drug is called —————a)drug abuse b)drug prescription c)drug influence d)drug over dose
2)communicable diseases can be spread from one person to ——————-a)another b)all c)none d)some people
3)————-affect the normal functioning of the body that causes discomfort a)disease b)vector c)microbes d)organism
4)————– are gotten from fruits a)vitamin b)protein c)water d)energy
5)Deficiency of vitamin c is ————–a)scurvy b)beriberi c)infertility d)all
6)_ is found at the outer part of a plant cell. (a) cell membrane (b) cell wall (c) lysosome (d) vacuole
7)_ is responsible for photosynthesis in plant (a) chloroplast (b) nucleus (c) ribosome (d) Golgi apparatus
8) An animal that lay egg is called (a) oviparous (b)viviparous (c) omniparous (d) homoithermic
9)Animals with backbone are called (a) invertebrate (b) vertebrate (c) Pisces (d) amphibians.
10)Plants that complete their life cycle within a year is called (a) bi-annual (b) annual (c) perennial (d) terestial

23/8/2020
Subject; Basic science
Class;JSS2
Topic;General review

Morning students, how was your night?, the Correction for the previous work is stated below and today we will continue with our general review .
Correction
1)b
2)c
3)d
4)c
5)b
6)c
7)c
8)d
9)b
10)d
General review

1)Another name for petroleum is called _ [a] gasoline [b] crude oil [c] engine oil [d] natural oil 2)The process of separating petroleum into its various fractions is called [a] distillation [b] fractional distillation [c] decentration [d] filtration
3) is used for road construction [a] fuel [b] bitumen [c] paraffin [d] petrol
4)The puberty signs in male include the following except [a] facial growth [b] pubic hair [c] widening of shoulders [d] menstrual cycle commences
5)Another name for uterus is called [a] ova [b] womb [c] scrotum [d] kidney
6)Lactic acid is found in the [a] egg [b] yam [c] milk [d] rice
7)The following are part of a skeletal system except [a] joint [b] muscle [c] ligament [d] heart
8)Vitamin help in bone and teeth formation [a] K [b] B [c] D[d] E
9)Butter and margarine are sources of _ [a] fat [b] vitamin [c] protein [d] carbohydrate
10)A liquid waste is called _ [a] refuse [b] sewage [c] decayed organic matter [d] oil spillage waste

20/8/2020
Subject; Basic science
Class;JSS2
Topic;General review

Morning students, how was your night?, the Correction for the previous work is stated below and today we will continue with our general review .
Correction
1)d
2)a
3)d
4)b
5)b
6)c
7)a
8)d
9)c
10)c
General review

1)Another name for Trachea is called [a] bronchioles [b] wind pipe [c] nostril [d] Alveeh
2)The process of taking in oxygen and releasing carbon(iv)oxide with the use of lungs is called [a] cellular respiration [b] Anaerobic respiration [c] breathing [d] Aerobic respiration
3)The following are respirations problem except [a] pneumonia [b] bronchitis [c] tuberculosis [d] Leukemia
4)There are _ bones in the body [a] 106 [b] 306 [c] 206 [d] 116 5)Ball and socket joint is found at the bones [a] head [b] hip [c] neck [d] fingers
6)The bone of the head is called [a] cerebrum [b] brain [c] cranium [d] medulla oblongata
7)The _ is the tough material that holds two bones together [a] joint [b] muscle [c] ligament [d] leg 8)The vertebral column include the following except [a] cervical [b] thoracic [c] lumbar [d] carpals 9)The minerals that make the bone strong is __ [a] nitrogen [b] calcium and magnesium [c] iron and sulphur [d] chlorine and oxygen
10)The blood vessels is divided into the following except [a] arteries [b] vein [c] capillaries [d] aorta

17/8/2020
Subject; Basic science
Class;JSS2
Topic;General review

Morning students, how was your night? Hope you are keeping safe, the Correction for the previous work is stated below and today we will continue with our general review .
Correction
1)c
2)c
3)c
4)b
5)a
6)a
7)c
8)c
9)c
10)C

General review

1)Which of these is not a fresh water habitat [A] ocean [B] River [C] Stream [D] pond

2)The organ involved in olfaction is [A] Ear [B] Eye [C] Nose [D] Tongue

3)During photosynthesis energy from the sun is converted to [A] kinetic energy [B] light energy [C] mechanical energy [D] chemical energy

4)The building block of protein is [A] polypeptide [B] Amino acids [C] sucrose [D] Glycerol

5)Which of these is not a part of the alimentary canal in human [A] Oesophagus [B] Pancreas [C] Diaphragm [D] Duodenum

6)Which of these vectors transmit malaria parasite [A] Tsetsefly [B] Blackfly [C] Anopheles mosquito [D] male ticks

7)The strongest part of the tooth is the [A] Enamel [B] Dentine [C] Pulp [D] Gum

8)The following solid particles cause environmental contamination of air except [A] Dust [B] Pollen grains [C] Sand [D] carbon(iv) oxide

9)The action of enzymes on food substances during digestion is describe as the __ mechanism [A] physical [B] mechanical [C] chemical [D] light

10)The complex sugar maltose is composed of [A] Fructose and glucose [B] glucose and galactose [C] Glucose and glucose

13/8/2020
Subject; Basic science
Class;JSS2
Topic;General review

General review

1)The bacterium that causes gonorrhea is [A] plasmodium malaria [B] Treponema pallidum
[C] Neisserra gonorrhea [D] mycobatenum dysenterae

2) All of these are compounds except [A] H2O [B] CO2 [C] O2 [D] CO

3)The chemical formula for table salt is [A] Kcl [B] CaCl2 [C] Nacl [D] MgCl2

4)Most plants are green in colour due to the presence of [A] sunlight [B] chlorophyll [C] leaves [D] Roots

5)The simplest unit of a substance that can exist separately is [A] Atom [B] ion [C] molecule
[D] Element

6)The major difference between man and other mammals is [A] Highly developed brain [B] Breast feeding the young [C] Eyes in front of the head [D] furs over the body

7)All of these are leguminous crop except [A]beansb)cowpea [C] rice [D] soyabeans

8)Which of these is a fibre crop [A] fruits [B] vegetables [C] cotton [D] cocoa

9)Which of these set of crops are cereals [A] cabbage lettuce, barley [B] pineapples, millet oranges [C]maize, rice wheat, guinea corn [D] sorghum, Barley, guava

10)The major nutrient contained in groundnut is [A] vitamins [B] carbohydrate [C] fats and oils [D] Protein

10/8/2020
Subject; Basic science
Class;JSS2
Topic;General review

1) The central nervous system (CNS) comprises the following [A] Nerves and Heart [B] Brain and Brain cord [C] spinal cord and Heart [D] Blood vessels and Brain

2)The following are the negative consequence of drug abuse except [A] Hallucination [B] organ malfunction [C] Healing [D] insanity

3)The basic units of inheritance in living organisms are the [A] Genus [B] cells [C] RNA [D] Nucleus

4)Salivary juid contains an enzyme called [A] Gland [B] Erepsin [C] maltose [D] ptyalin

5)In the small intestine, absorption of food substances occurs through the [A] Ileum [B] muscular walls [C] villi [D] Enzymes
6)Vitamin A is needed in diet for [A] Easy digestion [B] Good vision [C] promote growth [D] None of the above

7)The chemical symbols of sodium and Gold are _ and respectively [A] So and Gd [B] Na and Ar [C] K and Ag [D] Na and Au

8)Growth in an organism is [A] continuous [B] irreversible [C] Reversible [D] Rapid throughout life

9)Which of these is an example of chemical change
[A] Rusting of Iron [B] Escape of vapour from boiling water [C] melting o f candle wax [D]dissolution of sugar in water

10) All of these are compounds except [A] H2O [B] CO2 [C] O2 [D] CO

6/8/2020
Subject; Basic science
Class;JSS2
Topic;General review

1)White blood cells attack [a] food [b] blood [c] germs [d] water
2)Ability of an organism to feed is called [a] nutrition [b] irritability [c] growth [d] movement
3)The following are types of living things except______ [a] Bacteria [b] Fungi [c] prolista [d] lysosome
4)Another name for Aves is called [a] hen [b] birds [c] mammals [d] frog
5)The following animals are herbivores except______ [a] goats [b] giraffes [c] elephants [d] leopard
6)The locomotory organ of earthworm is [a] fins [b] wings [c] muscles [d] tube feet
7)Spider use for respiration [a] lungs [b] book lungs [c] gills [d] lenticels
8)The tip of the tongue is responsible for [a] sweetness [b] bitterness [c] saltiness [d] sourness
9)One of these is not a sense organ [a] Eye [b] Nose [c] Tongue [d] liver
_10) is a good conductor of heat [a] metal [b] non-metal [c] fossil [d] graphite 11)Deficiency of 11)protein result to __ [a] marasmus [b] poor sight [c] kwarshiokwo [d] scurvy

3/8/2020
Subject; Basic science
Class;JSS2
Topic;General review

Morning students, how was your weekend? Hope you are keeping safe, the Correction for the previous work is stated below and today we will continue with our general review .
Correction
1)A
2)B
3)C
4)C
5)C
6)A
7)A
8)D
9)A
10)D
1)The following are examples of an element except [a] H2 [b] N2 [c] 02 [d] CO2
2)The following are domestic animals except [a] Hen [b] dog [c] lion [d] turkey
3)Animals that feed on both plant and animals are called [a] omnivores [b] carnivores [c] herbivores [d] cavengers
4)The respiratory organ of plant is [a] lungs [b] kidney [c] stomata [d] liver
5) use wings and legs to move [a] fish [b] snail [c] insects [d] man
6)The following are sense organs except [a] ear [b] skin [c] tongue [d] liver
7) feed on plants only [a] sheep [b] dog [c] lion [d] leopard
8)The following are metals except [a] iron [b] lead [c] magnesium [d] chlorine
9)An organism that carry microbes which transmit infection is called [a] filarial [b] vector [c] bacteria [d] diseases
10)Sleeping sickness is caused by_______ [a] blackfly [b] tse-tse fly [c] culex mosquito [d] Aedes
11)Common diseases transmitted by vectors are the following except [a] malaria [b] diabetes [c] river blindness[d] filarial

30/7/2020
Subject; Basic science
Class;JSS2
Topic;General review

General review

1)————- is responsile for earth degradation a)animal b)man c)non living things d)none
2)————— are substances that decompose easily a)soil b)biodegradable c)non bbiodegradale d)sewage
3) Liquid waste is called ————–a)refuse )smoke c)sewage d)all
4)—————-protect the body from diseases and infections a)plasma )platelet c)white blood cell d)cloth
5)salmolena typhii causes ————–a)back pain )ulcer c)typhoid d)malaria
6)Afemale mosquito is also called a)anopheles )culex c)aedes d)filarial
7)The insect that carry microbes from the host to other organism is ——————a)vector )virus c)bacteria d)oncogens
8)The following are examples of drug that can be abused except a)alcohol )cocaine c)nicotin d)milk
9)The process of planting crops and rearing of animal is —————a)farming b)industrialization c)transportation d)production
10)The following are indoor activities except a) sewing b) reading c) playing ludo d) hockey

27/7/2020
Subject; Basic science
Class;JSS2
Topic;General review

Morning students, how was your weekend? Hope you are keeping safe, the Correction for the previous work is stated below and today we will start with general review .
Correction
Functions of the skin
1)To regulate temperature
2)For protection of internal organ
3)production of vitamin D
General review

1)Wearing dirty clothes attract a)germs b)energy c)bond d)odour
2)personal cleaniless is also called a)personal hygiene )sanitation c)endurance d)vector
3)A sponge is used to remove dirt from the a)hair )body c)none d)carpet
4)The outer part of the ear is ————-a)pinnae b )ear drum c)cortex d)none
5)All part of our body needs to be clean ———–a)regularly )in the night c) morning d)all
6)Lipid is also known as a)starch b )oxygen c)fat and oil d)all
7)A balanced diet contain all the ———– classes of food a)8 )6 c)3 d)2
8)Tse tse fly causes —————-a)malaria )sleeping sickness c)filarial d)typhoid
9)HIV means————————————–
10)STI means———————————-

23/7/2020
Subject; Basic science
Class:J.S.S.2
Topic;The skin
Morning students, how was your night? the correction for the previous assignment is stated below and todays topic is the skin.
Correction
1)million test – for protein
2) buiret test – for protein
3)Emulsion test- for lipids
4)Ninhydrin test – for protein
5)xanthoproteic test – for protein
The skin
It is largest organ of the body that varies in its thickness

Layers of the skin
It is divided into two layers which are
1)Epidermis
2)Dermis

Epidermis
It is the first layer of the skin i.e outer layer which is further divided into 3 sublayers
A)malphigian layers
B)Honey layers
C)Granular layers.
Dermis
It is the second layer of the skin I.e inner layer and it consists of the following structures
A)Blood vessels
B)Sebaceous gland
C)Hair errector muscle
D)Hair follicles
E)sweat duct
F)sweat gland
G)Fatty adipose tissue.

Question
State 3 functions of the skin

20/7/2020
Subject; Basic science
Class:J.S.S.2
Topic;Simple food test
Morning students, how was your weekend? the correction for the previous assignment is stated below and todays topic is simple food test.
Correction
A)Blood group
1 A
2 B
3 AB
4 O
B)Genotype
AA
AS
AC
SS
SC

Simple food test
They are the various method of testing or carrying out analysis on food.it includes the following
1)Test for carbohydrate
Materials; Yam,iodine solution
Procedure; Add iodine to the yam and observe the result
Conclusion: The colour of the yam changes to deep purple.
Summary: it shows the presence of starch

Test for fat and oil
Materials: palm oil,paper ,methylated spirit
Method: Rub palm oil on a paper
Pour methylated spirit on the paper
Leave to dry
Observe the result
Conclusion: paper becomes semi transparent when oil is rubbed but when methylated spirit is added ,the oil disappeared
Summary; it shows that fat and oil dissolves in alcohol

Test for protein
Materials: Fresh egg,sodium hydroxide, copper(ii) tetraoxosulphate( vi) solution
Method; mix the egg with sodium hydroxide and copper (ii) tetra oxosulphate (vi)
Conclusion; it changes to purple
Summary; it shows the presence of protein.

Questions
What do we use the follwing test for.
1)million’s test
2) buiret test
3)Emulsion test
4)Ninhydrin test
5)xanthoproteic test

16/7/2020
Subject; Basic science
Class:J.S.S.2
Topic; Blood diseases
Morning students, how was your night? the correction for the previous assignment is stated below and todays topic is blood diseases
Correction
1)The valves: It allows blood to flow from auricles to ventricles on each side of the heart
2)The lymph ;It is a clear yellowish watery fluid found throughout the body.it picks fats and other unwanted materials filtering them through the lymphatic system.
3)Involuntary muscles: It contracts and relaxes to allow blood flow out and in the heart respectively.
Blood diseases
There are various diseases of the blood which are
1)Anaemia (Shortage of blood)

Causes
-Nutritional deficiency such as iron
-Excessive loss of blood in case of accident or menstruation
-Attacked by diseases e.g malaria
-Failure of the body to produce or replace enough red blood cells.

2)Leukemia
Causes
1)Excessive exposure to x-ray
2)Excessive exposure to radioactivity
3)Excessive exposure to radiation of nuclear power station

3)Hemophilia;It affects the platelet in which the blood of the sufferer becomes unable to clot when there is a cut on the skin, the patient can bleed to death if not monitored.

4)HIV ;The virus attack the white blood cell and destroy the defense mechanism of the blood.

5)Sickle cell ;It is an hereditary diseases in which the sufferer do not have normal shape of the red blood cell ,instead it is sickled therefore unable to carry oxygen needed in the body, no cure yet but it can be managed.

Question
1)List the various blood group and genotype.

13/7/2020
Subject; Basic science
Topic:The heart
Sub topics:
-The meaning of the heart
-Parts of the heart
-Functions

Morning students, how was your night? the correction for the previous assignment is stated below and the topic for today is the heart

Correction
1)Land breeze :A breeze blowing towards the sea from the land especially at night due to relative warmth of the sea.
2)sea breeze;A breeze that blows from a large body of water towards or onto a land due to differences in air pressure created by different heat capacity of dry land and water
3)Ocean current:continuous movement of sea water due to forces acting on the water which include wind,salinity,temperature,waves e t.c

The heart
It is a muscular organ made up of four chambers(two chambers up and two Chambers down)
The upper Chambers are called auricles (Left and right auricles) While the lower chambers are called ventricles (right and left ventricles)
The heart is divided into 2 distinct section, the right and left side. The right side contain deoxygenated blood from the body which is to pumped blood to the other parts of the body.

Parts of the heart and their functions
1)pulmonary artery: it carries deoxygenated blood from the heart to the lungs for oxygenation
2)pulmonary vein:it carries deoxygenated blood from the lungs to the heart
3)portal artery;it carries oxygenated blood from the heart to other part of the body
4)vena cava(veins):it carries deoxygenated blood from the body to the heart
5)Right auricle:it receives blood from the body through the venacava and send it to the right ventricle
6)Right ventricle:it receives blood from the right auricle and send it to the lungs through the pulmonary artery
7)Left auricle:it receives blood from the lungs through the pulmonary veins and send it to the left ventricle
8)Left ventricle; it receives blood from the left auricles and send it to other part of the body through the aorta.
9)valves
10)involuntary muscles

Questions
Explain the following
-The valve
-The lymph
Involuntary muscles.

9/7/2020
Subject; Basic science
Topic;Thermal energy (continuation)
Sub topics: The meaning of Radiation
-its application

Morning students, how was your night? the correction for the previous assignment is stated below and the topic for today is thermal energy (Continuation).
Correction
1)Radiation is the transfer of energy from or to a body by the emission or absorption of electromagnetic radiation.
Note :Radiation’s definition have been given as correction

-Properties of Radiation
1)No medium is required for energy to be transfered
2)It can occur in and through a vacuum
3)Solar heat is transfered through Radiation
4)Transfer occur from higher temperatures to lower temperatures.

Its application
1)Transfer of heat through space
2)For rapid heating, cooking utensils are blackened at the bottom
3)White and light coloured shirts are preferred during summer because they are poor absorbers of heat and keep us cool
4)A thermos flask uses the principle of Radiation.

Questions
1)Explain the following
A)Land breeze
B)sea breeze
C)Ocean current

6/7/2020
Subject; Basic science
Topic; Thermal energy
Subtopics;
-what is thermal energy?
-Types of thermal energy
-Conduction
-Convection
-Its application

Morning students, how was your weekend?please, let us continue to keep safe ,the correction for the previous assignment is stated below and the topic for today is thermal energy.
Correction
1)The force of attraction in solid is very strong while that of liquid is not as strong as in solid and for the gas,it is weak.
2a)Sublimation
It is the process by which solid changes to gas directly without passing through the liquid medium.
2b)Freezing
It occurs when liquid change to solid.
2c)Melting
It occurs when solid change to liquid
2d)Condensation
It occurs when gas change to liquid.

Thermal energy
It is known as heat transfer or heat flow or heat exchange.
It is the process by which heat is moved from one object to another,it occurs at different temperature from the sorrouding,from the region of high temperature to a lower temperature.
Types
-Conduction
-Convection
-Radiation

Conduction
It is the transfer of energy between objects in physical contact, it is the most significant means of heat transfer within a solid.The more the difference in temperature, the faster the conduction.

Application
Cooking in metal pans.since heat is a good conductor of heat, it absorbs heat from the flame or heat source and readily transfer to the food.

Convection
It is the transfer of energy between objects and it’s environment due to fluid motion.it occurs on a large scale in the atmosphere and oceans.

Application
1)Ventilation of rooms
2)Chimneys in factories
3)Central heating of buildings
4)Installation of air conditioners
5)Land breeze, sea breeze and ocean current.
Question
What is radiation?

2/7/2020
Subject; Basic science
Topic;kinetic energy(continuation)
Sub topics:
-characteristics of gas

Boiling
-Evaporation
-Factors affecting evaporation

Morning students, how was your night? and happy new month,the correction for the previous assignment is stated below and the topic for today is continuation on kinetic energy

Correction
Characteristics of liquid
1)medium density
2)Cannot be compressed
3)Can flow
4)Take the shape of the container
5)Fixed size

Boiling
The conversion of a liquid to gas or vapour
The atoms in the vaporous state escape from the liquid medium.
The amount of heat supplied is so high that the atoms move very rapidly in all direction.
The movement increase so much that at a particular temperature ,the mass of an atoms begins to move physically.

Evaporation

It is also the conversion of a liquid to a gas.
It occurs when heat is applied
The kinetic energy of the atoms increases.
Increase in the kinetic energy result to molecules gaining more kinetic energy to overcome the surface attraction and move apart
It occurs at all temperatures.

Factors affecting evaporation
1)The density of the liquid
2)The rate of evaporation increases with an increase in temperature
3)It causes cooling
4)Presence of wind ,flow of air increases the rate of evaporation
5)The more the humidity in gaseous medium,the slower the rate of evaporation.

Questions
1)Compare the force of attraction that exist between the various state of matter.
.2)Define the following
A)Sublimation
B)Condensation
C)Freezing
D)Melting

29/6/2020
Subject; Basic science
Topic;kinetic energy
Sub topics; -The meaning of kinetic energy
-Dalton’s atomic theory
-kinetic energy in matter
Morning students, how was your weekend?the correction on the previous assignment is stated below and the topic for today is kinetic energy
Correction
1)load =80N ,effort=40N. M.A =?
M.A= Load/effort
M.A =80N/40N
M.A =2

2)Load =450N ,effort =100N. M.A=?
M.A = Load/effort
M.A =450/100
M.A =4.5

-What is kinetic energy?
It is the energy in motion or energy possessed by a moving body .Increase in temperature result to increase in kinetic energy of particles.

-Dalton’s atomic theory
John Dalton,an English chemist postulated the atomic theory in 1808.He did a lot of research on colour blindness, a disease from which he suffered. He was fascinated by the weather and was a renowned meteorologist as well.

1)All matters is made of atoms.Atoms are indivisible and indestructible
2)All atoms of a given elements are identical in mass and properties
3)Compounds are formed by a combination of two or more different kimds of atoms
4)A chemical reaction is a rearrangement of atoms.

-Kinetic energy in matter
matter is anything that has mass and occupy space.
There are 3states of matter which are
-Solid
-Liquid
-Gas
The motion of particles based on kinetic theory explains the characteristics of solids,liquids and gases.

-Characteristics of solid
1)High density
2)Cannot be compressed
3)Fixed shape
4)Fixed size
5)Do not flow

Question
State 5 characteristics of liquids

25/6/2020
Subject; Basic science
Topic:Efficiency of a simple machine
Sub topics:
-The meaning of efficiency of a machine
-Effort and Load

-How to care for a machine

Morning students, how was your night? Today’s topic is Efficiency of a machine but the correction on the previous assignment is stated below.

Correction
1)uses of a screw
A)To hold and position objects such as wood.
B)To lift things e.g auger to pump water or other liquids.
C)To lift the car or bus up before the wheel can be removed. It is called a jack.

2)Examples of screw
-screw driver.
-Jack.
-Nuts and bolts.

Efficiency of a machine
It is the process of applying a little effort to a machine to overcome a big load in the shortest possible time. It is denoted as output energy/input energy
Mechanical advantage
It is the ratio of work output to work input of a machine. It is denoted asM.A=load/effort

Load
It is the force against which the machine does the work .it is denoted ad Wo

Effort
It is the force applied to the machine. It is denoted as Wi.

Care of a machine
1)Use of oil and ball bearing to reduce friction
2)Change of oil regularly as it collects dirt.
3)Machines should be placed in a clean place to keep away dust, moisture
4)Regular maintenance and servicing
5)Machines and machine parts made of iron should be painted to prevent rusting.

Questions
1)A 40N effort is used to move 80N load .calculate the mechanical advantage.
2)calculate the mechanical advantage used to move a load of 450N with an effort of 100N.

22/6/2020
Subject; Basic science
Topic;Simple machine (Screw)
Sub topics;
-What is a screw?
-Parts of a screw
-How its work

Morning students, how was your weekend? Today’s topic is the screw but the correction on previous assignment is stated below.
Correction
Cog A is the driving wheel which initiate movement in a gear while Cog B is the driven wheel which moves and turns half way in opposite direction to Cog A in a gear.

What is a screw?
It is a cylinder with an inclined plane wrapped around it which allows it to fasten more easily e.g nuts and bolts.

Parts of a screw
A)The inclined plane
B)The center post

How its work
1)Once the tip of the screw has created a small hole and is turned to make a complete rotation, the screw move a distance equal to the distance between two threads of the screw
2)As the screw is rotated, it weaves into the object to be fastened
3)A screw is fastened using an instrument called a screw driver
4)A screw will always bind objects on a plane perpendicular to the length of the screw.

Questions
1)State 3 uses of a screw
2state 2 examples of a screw

18/6/2020
Subject; Basic science
Topic; Simple machine (Gear)
Sub topics;
-What is a Gear?
-mode of operation
-uses of a Gear

Morning students, how was your night? Today’s topic is Gear but the previous assignment is stated below

1)Examples of wheel and axle
A)pizza cutter
B)Door knob
C)Ferris wheel
D)Winch
E)Skateboard
F)wind mill e.t.c

2)Mechanical advantage
The ratio of workoutput to that of work input of a machine is called mechanical advantage.

What is a Gear?
Gears are like a continuous rotating lever,simple but very helpful machine.

Operations of a Gear
Gears make it possible to use small amount of effort for large amount of load based on the different sizes of wheels with different numbers of teeth.
Wheels in a gear system are called cogs,there is cogA which starts the movement (driving wheel),and cogB which end the movement(driven wheel),they turn in opposite direction,there is also cog c, the outer rim of the wheel have teeth.As cogs A rotates once,sixteen of its teeth pass between the teeth oforce B while CogB only turns half way round.

Uses of a Gear
1)For transmitting power from one part of the machine to another
2)Efficient in transferring energy
3)To transfer power from the pedals to the back wheel in a bicycle.
4)To increase speed or force .e.t.c

Question
1)In a sentence, differentiate between CogA and CogB of a Gear

2)state the main features of a Gear

15/6/2020
Subject; Basic science
Topic; Simple machine (wheel and axle)
Sub topics;
-The meaning of wheel and axle
-Examples
-mode of operation

Morning students, how has been your weekend? I hope it was great, please let’s continue to keep safe, today’s topic is wheel and axle ,but the corrections on the previous assignments is stated below.

Corrections on the previous assignments

Examples of the various classes of lever
1)First class lever
A)Scissors
B)Weighing balance

2)Second class lever
A)Nutcrackers
B)oars

3)Third class lever
A)Tongs
B)Long hand shovel.

2)Differentiate between load and effort.
Load is a heavy or bulky objects that requires effort to move or lift it.
While effort is the force applied to bring desired change to the position of the load.

Wheel and axle
It is a simple machine in which the force moves in the same direction as the load,it falls under class l lever.It is made from a wheel that turns on a centre post called the axle

Operations of a wheel and axle
1)The axle and the wheel rotate about the same axis
2)Ropes can be worn around both the wheel and axle
3)The load can be lifted by pulling on the rope around the wheel
4)For a complete rotation, the load moves a distance equal to the circumference of the wheel
5)The large the wheel, the less force required to move the load.

Examples
1)Steering wheel
2)Spanner
3)Screw driver
4)Bicycle pedals e.t.c

Questions
1)state other examples of wheel and axle
2)Define mechanical advantage

11/6/2020
Subject; Basic science
Topic; Introduction to Simple machines.
Sub topic;
-What are Simple machines?
-Types of simple machine
-Lever
-Classes of lever

Morning students, how has been your week? Hope it was great?The topic for today is introduction to Simple machines,but the corrections on the previous assignment is stated below

Corrections on the previous assignments
1)uses of petrochemicals
A) It is used in thermal insulation and building construction
B) It helps in pharmaceutical and food packaging e.g benzene
C)For beautification e.g cosmetics
D)To boost agricultural produce e.g fertilizer e.t.c

2)
A) construction of roads ( Bitumen)
B)Aviation fuel (Butylene)
C )petroleum gas( Automobiles)
D)Cosmetics (Lubricating oil)
E)kerosene (Cooking)
F)Fertilizer (paraffin)

-What are Simple machines?
They are tools without moving parts that help make work easier e.g scissors, tin openers,wheel barrow e.t.c

-Types of simple machine
1)Lever
2)Screw
3)Pulley
4)Inclined plane
5)Gear
6)Wheel and axle

Lever
It is a rigid rod capable of rotating about a fixed point or axis called fulcrum. It is one of the simplest and common of all Simple machines

Examples of lever are;
A)Seesaw
B)Hammer
C)Bottle opener
D)Doors on hinges e.t.c

Classes of lever
1)First class lever; The fulcrum is between the load and the effort e.g pliers, pincers,spade e.t.c
2)Second class lever; The load is between the fulcrum and the effort e.g wheel barrows,bottle openers e.t.c
3)Third class lever; The effort is between the fulcrum and the load e.g table knives,fishing rods e.t.c

Questions
1)List 2 other examples of the various classes of lever .
2)Differentiate between load and effort.

Note;make sure all notes are written in your class note.

8/6/2020
Subject; Basic science
Topic; petroleum and petrochemical( 11)
Sub topics;
-process of refining petroleum
-what are petrochemicals
-Examples of petrochemicals
-Uses
Morning students how was your weekend? hope it was great? Last week,we started with lntroduction to petroleum and petrochemical, today,the remaining notes will be given based on the sub topics stated above. Before the commencement of today’s class,the corrections on the previous assignment are listed below.

Corrections on the previous assignment
1)Fossils are obtained from under the ground, they were formed millions of years ago when dead plants and animals got fossilized.
While
Coal is formed by slow compression of forests that existed around 300million years ago, the intense heat and high pressure under the earth converted the plants into coal .

2)Uses of petroleum jelly
A)To moisture body,face and hand
2)To heal minor skin scrapes and burn
Process of refining petroleum
The process of refining petroleum is called fractional distillation. The crude oil(petroleum) is heated to a temperature of 400°c or above in a furnace, the vapour are fed at the bottom of a long fractionating column fillled with trays.As the vapour rises they lose heat and the temperature drops,thus vapour with higher boiling point condenses first while those with lower boiling point rise up and condense in different part of the fractionating column.

What are petrochemicals?
They are chemical products derived from petroleum which are obtained from fossil fuels such as coal or natural gas or renewable sources such as corn or sugar cane.
Examples of petrochemical
1)Lubricant
2)Adhesive
3)Catalyst
3)paint
4)Coating and resin
5)polyethylene
6)Detergent
6)Cosmetics
7)Fertilizer
8)Insecticides
9)Plastic
10)Nylon e.t.c.

Questions
1)State 5 uses of petrochemical
2)match the following
1)Lubricating oil
Fertilizer

2)Petroleum gas
Paraffin

3)Construction of roads
Kerosene

4)Cosmetic
Cooking

5)Aviation fuel
Automobile

6)Butylene
Bitumen

4/6/2020
Subject; Basic science
Topic; Introduction to petroleum and petrochemicals
Sub topics;-
-what is petroleum?
-Different classes of the components
-Uses of the components

Morning students, how are you?hope you are keeping safe,today’s topic is Introduction to petroleum and petrochemicals, but the correction for the previous assignment is stated below.

Corrections on the previous assignment
1)Importance of ICT to teachers
A)For effective presentation of information
B)For administrative task
C)Exposure to new ideas and innovatives
D)To create more learner centric learning. e.t.c

2 )Importance of ICT to students
A) It improves knowledge retention
B)It encourages individual learning
C)To learn useful life skills in teaching
D) It encourages collaboration and engagement

2)Telecommunication devices
A)Satellite
B) Fax machine
C)Internet e.t.c
1)What is petroleum?
It is formed from the remains of dead marine plants and animals that have settled in the sea for millions of years ago.It is called oil from rocks and it is known as crude oil. It is separated into its various components or fractions through fractional distillation.

Different classes of components
1)Light distillate
A)Naphtha
B)Kerosene

2)Middle distillate
A)Light gasoline oil
B)Heavy gasoline

3)Residue
All these are further processed into refinery fuels .

The various fractions are listed below
A)petrol
B)kerosene
C)Diesel
D)Lubricating oil
E)Bitumen
F)Cooking gas
G)Naphtha
H)Coal
.

Uses
1)Bitumen is used for road construction
2)Lubricating oil for polishing, automobiles and in the factories
3)Diesel is used for automobile
4)kerosene is used for lighting and heating,aircraft e.t.c

Questions
1)Differentiate between fossil and coal .
2)state 2 uses of petroleum jelly.
Note;The rest of the note will be given next class,make sure you copy the notes in your book.

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1/6/2020

Subject; Basic science

Topic; ICT

Sub topic; The meaning of ICT

-Its component

-Part of a computer

-Importance of ICT

Morning students, how was your weekend? I believe you are keeping safe,the topic for today is ICT, but before I start, the corrections for the previous assignment is stated below

Corrections on the previous assignment

1)Excretory products removed by the following organs

A)Skin (Sweat)

B)Kidney (Urine)

C)Liver(Bile)

D)Lungs(Carbon iv oxide)

2)Metabolic wastes are produced in the cell

3)No,

3a Because, it is not produced in the cell

3b It is in solid form which contain undigested food and not Metabolic waste that comes out of the body through egestion.

4)Excretion is the removal of metabolic wastes from the cells of the organisms

While

Egestion is the process of removing undigested waste product foods from the body of the organisms

5)Metabolic wastes are left over from Metabolic proceses that cannot be used by the organisms which are excreted in form of water solutes through excretory organs like kidney.

The meaning of ICT

ICT means information and communication technology, it refers to processing, sending, receiving, and retrieving of information through the use of electronic devices

Components of I CT

A)Computer

B)Fax machine

C)Telephones/mobile phones

D) Satellite

Computer

It is used to store data,process, analyse and retrieve it when required

Parts of a computer

It is divided into the following categories

A)Output devices;It helps to send out data e.g monitor, speakers, printers etc

B)Input devices;It helps to input data into a computer system e.gmouse,joystick, microphones, keyboard

C)Central processing unit ;To analyse data and store information,it consists the main memory, control unit and arithmetic logic unit of the system

Importance of ICT

1)To get information about other part of the world

2)It promotes research across the world

3) It makes learning and teaching simple and easy

4)To keep in touch with friends and families all over the world

5)Effectiveness in banking services with the use of ATM, POS e. t.c

6)Easy transactions like transfer of money,checking of account balance,payment of products e.t.c

Questions

1)State the importance of ICT to

A)Teachers

B)Students

2) List 5 telecommunication devices used today

No Fields Found.

28/5/2020

Subject : Basic science

Topic : Excretory system

Sub topics:

-The meaning of excretion

–Various excretory products

–Organs of excretion

– Structure of an excretory system

Good morning students, how are you, hope, you are keeping safe? during this holiday, I will like to talk about the excretory system.

–T he meaning of excretion

Excretion is the removal of metabolic wastes from the body. Which could be in liquid or gaseous form

There are various excretory substances which are stated below.

1_Urea

2)Uric acid

3)Water

4)Carbon iv oxide

5)Sweat

6)Salts (sodium chloride,potassium salts e.t.c)

7)Bile

Organs of excretion

1)Kidney

2)Skin

3)Lungs

4)Liver

Structure of an excretory system in man

Fig1;

Fig 2;

QUESTIONS

1)State the excretory products removed byf these organs

A)skin

b)kidney

c)Liver

d)Lungs

2) Where is the metabolic waste produced?

3)Is faeces an excretory waste? Give reasons for your aswer.

4)Differentiate between excretion and egestion.

5) what are metabolic waste?

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25 – 05 20

L E S S O N T W O

NOTE:Use the note given below to answer the following questions.

1.study the skeletal system properly and list out the bones of the fore limbs and hind limbs.

2. What are the major functions of arteries,veins and capillaries.

3.State the various blood groups and genotype.

This form is currently undergoing maintenance. Please try again later.

Hello students,hope you are good and keeping safe,i will like to revise this topic; The Skeletal system.

What is a skeleton?

A skeleton is a bony structure that gives shape and support to the body.It also aids movement and locomotion in human

what are the various types of skeleton?

There are two major types of skeleton which are;

A)Exosketon (which is found on outside the body of an organism)

b)Endoskeleton (It is found inside the body of an organism )

Can you still remember the various part of the skeletal system which are; Bones, ligament,tendon,muscles,joint.

There are about 206 bones in the body at specific point for a particular function

I believed you still remember the main functions of the skeletal system,some of which are;

A)It provides structure and support to the body

B)A site for red blood cell formation

c)It protects the vital organs of the body e.t.c

QUESTION
A) List the various other functions of the skeleton
b)Differentiate between ligament and tendon

Note;Make sure you put your subject name in the box provided for the anwer

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18/5/2020

Subject;Basic science

Topic;Blood

Sub topic;

-What is blood?

– Components of blood

-Typical structure of the components of blood

-Functions of the blood

-The blood vessel

Hello students, how are you?hope you are enjoying the holiday? I will like to revise the topic ;Blood.

What is blood?

Blood is a medium through which all substances (nutrients, water ,hormonese.t.c)are carried all over the body.It has a life span of about 120 days and is biconcave in shape.

-Structure of the blood

– Components of blood

A)Red blood cell(Erythrocytes);It carries oxygen from the lungs to the cells and carbon iv oxide from the cells to the lungs.

B)white blood cell (Leukocytes);It produces antibodies which help to defend the body against germs and infections

C)plasma;It is the liquid portion of the blood which carry water,inorganic salts,proteins,hormones e.t.c to where it is needed in the body.

D) Platelet;It helps in blood clotting during bleeding

-Typical structures of the components of blood

Figure (1 and 2)

Lastly,I will quickly talk about the blood vessel.

-Blood vessel;They are the arteries,veins and capillaries which help in transportation of oxygen and blood to and from the heart.

Questions;

1)State other functions of the blood

2)List 4 diseases of the blood

Note;Make sure you put the subject name in the box provided for the answer

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