KUULCHAT
SCIENCE MOCK
OBJECTIVE TEST
1.
Soil aeration can be improved by
A.
Adding mineral to the soil
B.
Application of fertilizer to the soil
C.
Weathering
D.
Activities of earthworms
E.
Manuring
Answer: D
2.
Cultural practices are activities undertaken on a farm
A.
after harvesting and before processing.
B.
before maturity and after harvesting.
C.
after planting and before harvesting.
D.
before transplanting seedling.
Answer: C
3.
Alum is added to water during treatment to
A.
kill germs.
B.
help suspended particles to settle.
C.
make the water colourless.
D.
give taste to the water.
Answer: B
4.
Which of the following is not a characteristic of all living things?
A.
Transpiration
B.
Growth
C.
Reproduction
D.
Feeding
E.
Respiration
Answer: A
5.
Decay is an important biological process because it brings about the
A.
formation of nutrients in living organisms
B.
manufacture of cells of living organisms
C.
production of oxygen by plants
D.
release of nutrients from dead organisms
E.
release of waste substances from bacteria
Answer: D
6.
Which of the following human activities causes pollution of the environment?
A.
Cutting down timber in the forest for firewood
B.
Overgrazing of the field by cattle
C.
Burning of coal and petrol in industries
D.
Building dams across rivers
E.
Destruction of diseased crops
Answer: C
7.
The farm animal which has crop as part of its digestive system is the
A.
fowl.
B.
goat.
C.
pig.
D.
sheep.
Answer: A
8.
Which of the following gases support combustion?
A.
Carbon dioxide
B.
Carbon monoxide
C.
Hydrogen
D.
Nitrogen
E.
Oxygen
Answer: E
9.
A cylinder metal has radius 7 cm and height 2 cm. Determine the volume of the cylinder.
[Take π = ]
A.
44 cm3
B.
107 cm3
C.
308 cm3
D.
1078 cm3
Answer: C
Volume of a cylinder
Volume = πr2h
Where r = radius of the base of the cylinder
h = height of the cylinder
r = 7 cm
h = 2 cm
π =
r2 = r x r
Volume = x 7 cm x 7 cm x 2 cm
Note: the denominator 7 cancels on of the 7s multiplying.
Volume = 22 x 1 cm x 7 cm x 2 cm
Volume = 308 cm3
10.
Which of the following examples is a source of energy?
A.
Electricity
B.
Heat
C.
Light
D.
Wood
Answer: D
11.
Nitrogen deficiency in soils causes
A.
poor seed formation.
B.
yellowing of leaves.
C.
purple colouration.
D.
fruit drop.
Answer: B
Slow growth and uniform yellowing of older leaves are usually the first symptoms of nitrogen (N) deficiency. Nitrogen-deficient plants produce smaller than normal fruit, leaves, and shoots.
12.
There are thick forests in part of the world where the climate is
A.
Hot and wet
B.
cool and wet
C.
hot and dry
D.
cool and dry
E.
warm and dry
Answer: B
13.
The human male sex cell that takes part in reproduction is the
A.
penis
B.
scrotum
C.
sperm
D.
testis
Answer: C
14.
A fertilized ovule results in the formation of
A.
an ovary
B.
a style
C.
a pistil
D.
a stigma
E.
an embryo
Answer: E
15.
Which of the following substances is made up of only one kind of atom?
A.
Iron
B.
Salt
C.
Steel
D.
Water
Answer: A
16.
The portion of air which acts as a solvent is
A.
oxygen.
B.
carbon (IV) oxide.
C.
nitrogen.
D.
an inert gas.
Answer: C
Since the concentration of nitrogen (N2) is maximum in air (78%). Hence, the solvent is Nitrogen gas and other gases like Oxygen and other gases act as solute.
17.
Which of the following properties is true about all matter? Matter has
A.
volume and fixed shape.
B.
volume and mass.
C.
mass and indefinite volume.
D.
density and fixed shape.
Answer: B
18.
The relative proportion of sand, silt and clay in a given sample of soil is soil
A.
profile.
B.
porosity.
C.
structure.
D.
texture.
Answer: D
19.
A meal containing all the essential nutrients in the right amounts is said to be
A.
delicious.
B.
balanced.
C.
well-cooked.
D.
rich in fibre.
Answer: B
20.
The central nervous system consists of the
A.
spinal cord and spine.
B.
brain and the nerves.
C.
brain and the spinal cord.
D.
skeletal system and skull.
Answer: C
21.
Which of the following animal parasites could be controlled by hand picking?
A.
Liver fluke
B.
Tapeworm
C.
Tick
D.
Roundworm
Answer: C
22.
Boiling and chlorination are used in water purification to
A.
kill germs.
B.
help suspended particles to settle.
C.
remove suspended particles.
D.
remove hardness of the water.
Answer: A
23.
A clear solution of sugar was cooled from 100oC to 25oC. Some solid sugar was seen to have formed out of the solution after the cooling. This shows that sugar
A.
does not dissolve in cold water.
B.
does not dissolve in hot water.
C.
dissolves more in hot water than in cold water.
D.
dissolves more in cold water than in hot water.
Answer: C
24.
Which of the following features is shown by plants only?
A.
Feeding
B.
Growth
C.
Transpiration
D.
Reproduction
E.
Respiration
Answer: C
25.
Which of these is a vegetable crop?
A.
Pineapple
B.
Potato
C.
Cabbage
D.
Cassava
E.
Mango
Answer: C
26.
The part of air which supports burning is
A.
nitrogen
B.
inert gas
C.
water vapour
D.
oxygen
E.
carbon dioxide
Answer: D
27.
External respiration in living organisms is also known as
A.
aerobic respiration.
B.
anaerobic respiration.
C.
gaseous respiration.
D.
tissue respiration.
Answer: C
28.
A uniform mixture of two or more metals is called
A.
an alloy.
B.
a compound.
C.
a solvent.
D.
a suspension.
Answer: A
29.
A patient with symptoms of diarrhoea and vomiting may be suffering from
A.
cholera.
B.
dysentery.
C.
influenza.
D.
tuberculosis.
Answer: A
30.
A metal displaces 5.0 cm3 of water when it is totally immersed. If the mass of the metal is 35.0g, calculate its density.
A.
7.0 g cm-3
B.
30.00 g cm-3
C.
40.00 g cm-3
D.
175.00 g cm-3
Answer: A
Density
Density =
Mass = 35.0 g
Volume = 5.0 cm3
Density = = 7 g cm-3
31.
The transfer of heat from the bottom to the top of a beaker containing water is by
A.
absorption.
B.
conduction.
C.
convection
D.
radiation
Answer: C
32.
Mosquito pupa breathes through tubes called
A.
trachea.
B.
siphon.
C.
lungs.
D.
gills.
Answer: B
33.
Which of the following gases is given out during photosynthesis?
A.
Carbon dioxide
B.
Carbon monoxide
C.
Nitrogen
D.
Oxygen
Answer: D
Plants use carbon dioxide for photosynthesis and give out oxygen
Animals take in oxygen during respiration and give out carbon dioxide, water and energy
34.
The nearest planet to the sun in the solar system is
A.
Earth
B.
Mars
C.
Mercury
D.
Venus
Answer: C
Mercury is the smallest planet in our solar system and nearest to the Sun, Mercury is only slightly larger than Earth's Moon.
35.
Air is an example of
A.
gas in gas mixture.
B.
liquid in liquid mixture.
C.
solid in liquid mixture.
D.
solid in solid mixture.
Answer: A
36.
Which of the following gases helps in rusting?
A.
Carbon dioxide
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Answer: C
The rusting of iron (Fe) is shown by the chemical equation below:
4Fe + 3O2 + 6H2O → 4Fe(OH)3
37.
The process of removing unproductive poultry birds from a flock is referred to as
A.
candling
B.
culling
C.
dehorning
D.
drenching
Answer: B
38.
The type of the human teeth used for biting food substance is
A.
canines
B.
incisors
C.
molars
D.
premolars
Answer: B
39.
The solvent which is most effective in washing bitumen from the hand is
A.
acid.
B.
alcohol.
C.
kerosene.
D.
water.
Answer: C
40.
Which of the following structures contain cellulose?
A.
Cell wall
B.
Cell membrane
C.
Chloroplast
D.
Mitochondrion
Answer: A
THEORY QUESTIONS
1.
a)
What are
i)
annual plants?
ii)
perennial plants?
b)
Mention one danger involved in each of the following activities in the laboratory:
i)
eating or drinking water in the laboratory;
ii)
washing hands with unknown liquid in a beaker;
iii)
walking barefooted.
c)
i)
What is a digestive enzyme?
ii)
Give two examples of digestive enzymes in humans.
d)
Give two differences between conduction and radiation of heat.
a)
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.
b)
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
c)
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
d)
Differences between conduction and radiation of heat
| CONDUCTION | RADIATION |
| Travels in a material medium well | Travels through a vacuum |
| Does not depend on the colour (black or white) of the body | Black bodies radiate heat well |
| Heat travels from one molecule to another | Heat travel is by electromagnetic waves |
2.
(a)
Name two:
(i)
animal products used in preparing protein-rich feed for poultry;
(ii)
plant produces used in preparing carbohydrate-rich feed for poultry.
[4 marks]
(b)
Describe briefly the water cycle.
[6 marks]
(c)
Consider the following mixtures:
Air, vinegar.
Air is essential to life.
Vinegar is a common household substance.
(i)
Name the two major components of each mixture.
(ii)
Which of the components named in (i) acts as the solvent in each of the mixtures?
[6 marks]
(d)
(i)
State two reasons why there is no life on the planet Jupiter.
(ii)
List two other outer planets without life.
[4 marks]
(a)
(i)
Animal products used in preparing protein-rich feed for poultry
1. Feather meal
2. Blood meal
3. Fish meal
4. Milk by-products
5. Meat meal
Any 2 x 1 mark = 2 marks
(ii)
Plant produces used in preparing carbohydrate-rich feed for poultry
1. Sorghum
2. Millet
3. Maize
4. Wheat
5. Rice
6. Wheat bran
Any 2 x 1 mark = 2 marks
(b)
The water cycle
Water evaporates from water bodies into the atmosphere (1 mark) where it condenses into the clouds (1 mark) and falls back into the earth's surface as rain (precipitation) (1 mark).
This then flows into water bodies (1 mark) and taken up by plants (1 mark) which transpire to give water vapour (1 mark).
6 marks
(c)
(i)
Vinegar → ethanoic acid (1 mark) and water (1 mark)
2 marks
Air → nitrogen (1 mark) and oxygen (1 mark)
2 marks
(ii)
Vinegar → water is the solvent (1 mark)
Air → nitrogen is the solvent (1 mark)
2 marks
(d)
(i)
Reasons why there is no life on the planet Jupiter
1. Extreme/cold temperatures
2. No oxygen
3. No water
4. Far away from the sun
5. Absence of solid surface
6. Toxic radiations/gases
7. Strong magnetic field
Any 2 x 1 mark = 2 marks
(ii)
Other outer planets without life
1. Saturn
2. Uranus
3. Neptune
Any 2 x 1 mark = 2 marks
3.
a)
i)
State two differences between an ecosystem and a habitat.
ii)
What is meant by the term blood?
b)
Explain why it is difficult to separate iron and sulphur mixture after strong heating.
c)
Draw and label a diagram of a ray of light which makes an angle of 350 with the surface of a plane mirror.
d)
State two
i)
advantages of a land rotation.
ii)
disadvantages of land rotation.
a)
i)
| Ecosystem | Habitat |
| Larger | Smaller |
| Larger number of species | Smaller number of species |
| Involves different species | Involves a specific species |
ii)
Blood is a body fluid that transports oxygen and nutrients to the cells and carries away carbon dioxide and other waste products.
b)
Reasons why iron and suphur cannot be separated when heated
After heating, a chemical change occurs and the two substances are chemically combined (compound formed) and no longer a mixture
c)
Angle of incidence = Angle of reflection
Angle of incidence + 35o = 90o
Angle of incidence = 90o - 35o
Angle of incidence = 55o
Since angle of incidence = Angle of reflection
Angle of reflection = 55o
d)
i)
Advantages of land rotation
1. It helps check the spread of diseases
2. Land regains lost nutrients after the fallow period
3. Checks spread of pests
ii)
Disadvantages of land rotation
1. Does not encourage large scale farming
2. Virgin forest is destroyed
3. Needs a lot of time and work/ not easy to practice
4. Land is not fully utilized
5. Not suitable for areas where land is scarce
6. Encourages soil erosion
4.
a)
i)
State two uses of water in agriculture.
ii)
Name two crops that are deep rooted.
b)
i)
Explain the term circulatory system in humans.
ii)
Classify each of the following processes as diffusion or osmosis:
α)
absorption of water by the roots of a plant
β)
movement of digested food from the small intestine into the blood stream
c)
i)
What is mass?
ii)
A box of equal size 3cm has a density of 2.0gcm-3.What is its mass?
d)
Give the state of each of the following substances:
i)
ash;
ii)
carbon dioxide.
a)
i)
Uses of water in agriculture
1. Cleaning
2. Irrigation
3. Fishing/Fish farming
4. For fertilizer application
5. For pest control
6. Drinking/consumption by farm animals
ii)
Deep rooted crops
1. Tomato
2. Carrots
3. Yam
4. Cassava
5. Watermelon
6. Cocoyam
7. Pumpkin
b)
i)
Circulatory system is a collection of tissues and organs which transports materials or food or water or oxygen throughout the (whole) body
ii)
α)
Absorption of water by the roots of a plant
Osmosis
β)
Movement of digested food from the small intestine into the blood stream
Diffusion
c)
i)
Mass is the amount of substance (matter) in a body or particle
Is a measure of how much matter is in an object
ii)
Density = Mass / Volume
Mass = Density x Volume
Density = 2.0 g cm-3, Length = 3 cm
Length of a cuboid (Equal size) = Length x Length x Length
Volume of the box = 3 cm x 3 cm x 3 cm = 27.0 cm3
Mass = 2.0 g cm-3 x 27.0 cm3 = 54.0 g
d)
i)
ash → solid
ii)
carbon dioxide → gas
5.
a)
i)
What is a mixture?
ii)
Explain why some mixtures are thoroughly stirred before they are used.
b)
i)
What is reflection of light?
ii)
State two characteristics of the images formed by plane mirrors.
c)
i)
What is a fertilizer?
ii)
Give one example of an inorganic fertilizer.
d)
i)
What is indiscriminate sex?
ii)
State two dangers of indiscriminate sex on humans.
a)
i)
Mixture is what is formed when two or more substances are put together/combine physically.
ii)
Why some mixtures are thoroughly stirred before they are used
Mixtures are thoroughly stirred to make a homegenous/uniform mixture
OR
Mixtures are thoroughly stirred to make even/uniform concentration
b)
i)
Reflection of light is the bouncing of light from a surface.
ii)
Characteristics of the images formed by plane mirrors
1. It is erect (upright)
2. It is virtual
3. It is laterally inverted
4. Same distance behind mirror as object is in front of mirror
5. Same size and shape as the object
c)
i)
Fertilizer is any substance which is applied to the soil or plant to supply nutrients for plant growth.
ii)
Examples of an inorganic fertilizer
1. Urea
2. Muriate of potash
3. Single super phosphate (SSP)/sulphate of ammonia
4. NPK
d)
i)
Indiscriminate sex is the act of having sexual intercourse with different/many/multiple partners.
ii)
Dangers of indiscriminate sex on humans
1. Acquiring sexually transmitted diseases
2. Unwanted pregnancy/becoming pregnant
3. Causing abortion
6.
(a)
What is a living cell?
(b)
Give one function of each of the following components of a living cell:
(i)
cell membrane
(ii)
chloroplast
(iii)
nucleus
(c)
Make sketches to show the arrangement of the particles in each of the three states of matter.
(d)
What instrument would you use to measure each of the following quantities:
(i)
volume of a liquid
(ii)
mass of a stone
(iii)
time
(iv)
speed of the wind?
(a)
Living cell is the smallest basic unit of a plant or animal/living organism
(b)
(i)
Functions of the cell membrane
1. It protects a cell
2. It allows only selected substances to enter or leave the cell
(ii)
Function of the chloroplast
It contains chlorophyll (green pigment) which traps sunlight for photosynthesis
(iii)
Functions of the nucleus
1. Embodies the genetic information (genes) of the organism
2. Makes cell division or reproduction possible
3. Controls the activites of the cell
(c)
Arrangement of molecules in a solid
Arrangement of molecules in a liquid
Arrangement of molecules in a gas
(d)
Measuring instruments
| # | Qunatity | Instrument(s) |
i. |
Volume of a liquid |
1. Measuring cylinder
|
ii. |
Mass of a stone |
1. Beam balance
|
iii. |
Time |
1. Watch/clock
|
iv. |
Speed of the wind |
Anemometer |