i)

The stone displayed water

OR

The stone occupied space

OR

The volume of the stone was added to the water

ii)

The cork would float

OR

The stone acts as a sinker

iii)

The cork will move up again

OR

The cork will float

iv)

Volume = Final Volume - Initial Volume

v)

Density = $\frac{\mathrm{Mass}}{\mathrm{Volume}}$

Density of cork = $\frac{\mathrm{Mass\; of\; cork}}{\mathrm{Volume\; of\; cork}}$

Mass of cork = 4 g

Volume of cork = 2 cm³

Density of cork = $\frac{\mathrm{4\; g}}{2{\mathrm{cm}}^3}$

Density of cork = 2 gcm^-3

vi)

To avoid splashing/spilling of water

i)

I → Volumetric flask
II → Beaker
III → Funnel
IV → Stirring rod/Stirrer
V → Wash bottle

ii)

I → Used to prepare standard solution or prepare solution of known/given volume

II → Used to dissolve the solute/It could also be used to hold solution.

III → Transfer liquid/solution into the flask

IV → To stir or mix the solution

V → The water it contains is used to top solutions up to required level without exceeding the level/It can be used to wash solution stuck to containers for effective titration experiments

i)

I → Terminal bud II → Flower III → Leaf IV → Leaf stalk/petiole/node V → Stem VI → Root

ii)

Functions of I (Terminal bud)

1. Protects the growing regions
2. Develops into flower

Functions of II (Flower)

1. For reproduction
2. Fruit formation
3. For pollination

Functions of III (Leaf)

1. For photosynthesis/absorption of sunlight
2. For transpiration
3. For exchange of gases between the atmosphere and the plant

Functions of V (Stem)

1. Holds leaves/flowers to perform their functions
2. Transports/conducts water to parts of plant
3. For Storage of food

Functions of VI (Root)

1. Absorption of nutrients/water from the soil
2. Holds/Anchors plant firmly in the soil
3. Stores excess food in some plants

iii)

Main parts of a flowering plant

Shoot (system)
Root (system)

i)

Rabbit

ii)

I → Ear/Pinna
II → Cleft lip
III → Belly
IV → Hind limb
V → Tail
VI → Rump

iii)

Hutch

iv)

Breeds of rabbit

1. Dutch
2. Chinchilla
3 Rose
4. English
5. Beveren
6. Belgian
7. New Zealand
8. Chin Ginganta
9. Flenish Giant
10. Polish
11. New Zealand Red
12. Angora
13. California White
14. Florida White
15. Havana
16. Lilac
17. Lop
18. Rex
19. Spanish (Giant)
20. Continental Giant
21. Cinnamon
22. Silver

v)

Management practices to be adopted in order to control diseases and pests in the rearing of rabbit

1. Regular vertinary services
2. Provide good drinking water
3. The hutch should be cleaned regularly
4. The feeder should be washed
5. Disinfectant should be used
6. Dry feed should be given to the animal
7. Recommended pesticides should be used to control pests
8. Separate/isolate sick animals from healthy ones

i)

Technology is the use of the environment to improve lives to meet the needs of society.

OR

Technology is the systematic application of scientific ideas/knowledge/discovery to improve lives to meet the needs of society.

OR

Technology is the application of scientific ideas/knowledge/discovery to produce goods and services.

ii)

Uses of technology in communication

1. Computers
2. Internet
3. Mobile phones/Telephones
4. Fax machine
5. Radio
6. Satellite
7. Television

i)

4Fe + 3O₂ → 2Fe₂O₃

ii)

2Na + Cl₂ → 2NaCl

iii)

2H₂ + O₂ → 2H₂O

i)

Functions of nucleus

1. Controls life activities of cells
2. Controls cell reproduction/division
3. Contains heredity units (called genes)

ii)

Functions of chloroplast

1. Contains chlorophyll
2. Absorbs light energy
3. For photosynthesis

iii)

Functions of mitochondrion

For the production of energy/serves as site for respiration

(i)

Differences between electrical insulators and electrical conductors

(ii)

Effects of illegal electrical connections in the home

1. Overload of power supply
2. Drop in voltage of electricity
3. Leads to frequent power cuts
4. Leads to electrocution/electric shock
5. May cause fire outbreak
6. May damage electrical appliances
7. Leads to loss of revenue to government

(i)

Condensation is the change from the gas state to the liquid state.

(ii)

Freezing is the change from the liquid state to the solid state.

i)

A transistor is a three terminal (a base, emitter and collector) semiconductor device.

ii)

Uses of a transistor

1. Used as an amplifier
2. Used as a switch
3. Used as a rectifier
4. Used for tuning in radios
5. Used as a voltage/current regulator

i)

Suitable solvents for grease

1. Petrol
2. Kerosene
3. Methylated spirit

ii)

Suitable solvents for ink stain

1. Milk
2. Alcohol
3. Parazone
4. Shaving cream
5. Kerosene

iii)

Suitable solvents for starch

1. Alcohol
2. Acetone

iv)

Suitable solvents for cube sugar

Water

v)

Suitable solvents for oil paint

1. Turpentine
2. Kerosene
3. Petrol
4. Thinner

vi)

Suitable solvents for iodine

1. Ethanol/Alcohol
2. Potassium iodide solution

i)

Respiratory organ is an organ used by living organisms for gaseous exchange

ii)

Structures of the respiratory system of humans

1. Trachea
2. Lungs
3. Alveolus
4. Larynx
5. Diaphragm
6. Bronchus/Bronchi
7. Nostril/Nose
8. Nasal cavity
9. Intercostals muscle
10. Ribs
11. Pharynx

i)

Agricultural chain is a series of stages that are connected in the production of agricultural goods/services.

ii)

Types of agricultural chain

1. Production
2. Processing
3. Supply
4. Value

i)

Stars are natural heavenly bodies/natural bodies in space that burn to produce heat and light.

OR

Stars are glowing balls of hot gas in space.

ii)

Arrangement in order from the sun to the first four planets in the solar system

1. Mercury
2. Venus
3. Earth
4. Mars

Note: The following is an acronym to remember the nine planets in order

My (Mercury) Very (Venus) Easy (Earth) Method (Mars) Just (Jupiter) Speeds (Saturn) Up (Uranus) Nothing (Neptune)

i)

Differences between plants and animals

ii)

Similarities between plants and animals

1. They are made up of cells
2. They feed
3. They respire
4. They move
5. They are sensitive to stimuli
6. They reproduce
7. They excrete
8. They grow

i)

Pastoral farming is a type of farming system in which the farmer keeps only animals and moves from place to place with them in search of food and water.

ii)

Ecological farming is a type of farming system in which chemicals and heavy machinery are not used in order to protect the environment.

i)

Properties of water in terms of odour

Water is odourless

ii)

Properties of water in terms of taste

Water is tasteless

iii)

Properties of water in terms of effect on litmus

Water is neutral to litmus

OR

Water does not change blue or red litmus paper

OR

Water has no effect on litmus paper

i)

Annual plants are plants which grow in one year/season during which they produce fruit and seeds and die off.

OR

Annual plants are plants that complete their life cycle in one season/one year.

ii)

Perennial plants are plants which continue to grow season after season producing fruits and seeds.

OR

Perennial plants are plants that complete their life cycle in more than two years.

i)

Danger involved in eating or drinking water in the laboratory

May result in the drinking of poisonous substances or eating contaminated foods.

ii)

Danger involved in washing hands with unknown liquid in a beaker

May result in burns/irritation/injury

iii)

Danger involved in walking barefooted

1. May result in slipping if there is water on the floor.

2. A person/One may get pricked with pieces of broken bottles/pins

3. A person/One may get burnt

i)

Digestive enzyme is a chemical/biological catalyst that help in breaking down food substances in the body

ii)

Examples of digestive enzymes in humans

1. Salivary amylase/Ptyalin
2. Pancreatic amylase
3. Maltase
4. Sucrase
5. Proteases/pepsin/rennin/trysin/erepsin/peptidase
6. Lipases