KUULCHAT
S.H.S SCIENCE MOCK
OBJECTIVE TEST
1.
The diagram below illustrates a uniform metre rule. Which point represents its centre of gravity?
A.
Q
B.
R
C.
S
D.
T
Answer: C
2.
Which of the following hormones maintains pregnancy in humans?
A.
Follicle-simulating hormone
B.
Oestrogen
C.
Progesterone
D.
Testosterone
Answer: C
3.
Which of the following statements about electrOns is/are correct? They
I. have positive charges
II. reside inside and outside
III. are used in bonding
A.
I only
B.
III only
C.
II and III only
D.
I, II and III
Answer: B
4.
The charges carries in a semi-conductor are
A.
holes only
B.
protons only
C.
holes and electrons
D.
hoes and neutrons
Answer: C
5.
Yam is classified as a
A.
Cereal
B.
legume
C.
root tuber
D.
stem tuber
Answer: C
6.
The diagram below illustrates the motor neurone. Study it carefully and answer the question below.
The dendrite is labelled
A.
I
B.
II
C.
III
D.
IV
Answer: A
7.
The amount of light entering the human eye is regulated by the...
A.
cornea
B.
lens
C.
pupil
D.
retina
Answer: C
8.
Cassava mosaic is spread by an insect called..
A.
capsid
B.
mealy bug
C.
moth
D.
whitefly
Answer: D
9.
Which force is greatly reduced when a lubricant is applied to the moving parts of an engine?
A.
gravitational force
B.
frictional force
C.
magnetic force
D.
centripetal force
Answer: B
Frictional force refers to the force generated by two surfaces that contacts and slide against each other. A few factors affecting the frictional force: These forces are mainly affected by the surface texture and amount of force impelling them together.
Ways of reducing friction
1. The use of bearing surfaces that are themselves sacrificial, such as low shear materials, of which lead/copper journal bearings are an example.
2. Replace sliding friction with rolling element friction, such as with the use of rolling element bearings.
3. Improve overall lubrication either by changing viscosity, using differing or improved additives or through the use of different lubricants themselves, i.e., synthetics, solids, etc.
10.
Spacing of plants on the farm varies mainly according to the...
A.
type of soil
B.
the planting season
C.
fertility of the soil
D.
the variety of the crop
Answer: D
11.
The diagram below illustrates the motor neurone. Study it carefully and answer the question below.
Which part of the neurone is a point of contact with a gland?
A.
I
B.
IV
C.
VI
D.
VII
Answer: A
12.
which of the following gases are major atmospheric pollutants
I. Nitrogen dioxide
II. Oxygen
III. Chlorofluorocation
A.
I and II
B.
I and III only
C.
II and III only
D.
I, II and III only
Answer: B
13.
A ball and socket joint in the human body does not allow circular
A.
circular movement
B.
side to side movement
C.
up and down movement
D.
gliding movement
Answer: D
14.
Which of the following food chain is correct
A.
Grass frog ----> grasshopper ----->hawk
B.
Hawk ----> grass ----> grasshopper ---> frog
C.
Grass ----> grasshopper ----> frog ----> hawk
D.
Grasshopper ----> grass ----> frog ----> hawk
Answer: C
15.
Which of the following crops is not a root vegetable?
A.
Carrot
B.
Ginger
C.
Lettuce
D.
Onion
Answer: C
16.
The pollutant which reacts with rain water to produce acid rain is
A.
Oxygen
B.
Nitrogen
C.
Nitrogen dioxide
D.
Carbon monoxide
Answer: C
17.
Reflection of light occurs because light travels from medium to another
A.
in the same direction
B.
with the same intensity
C.
with different velocities
D.
obeying the laws of reflection
Answer: C
18.
Which of the following properties is associated with ionic compound?
A.
are soluble in organic solvent
B.
conduct electricity in the molten state
C.
have low melting and boiling point
D.
consists of molecules
Answer: B
19.
Which of the following hydrocarbons is an alkyne?
A.
C2H2
B.
C2H4
C.
C3H6
D.
C3H8
Answer: A
20.
Rainbow formation is a practical illustration of the light phenomenon known as
A.
dispersion
B.
interference
C.
mirage
D.
reflection
Answer: A
21.
The commonest method for propagating crops in Ghana is by
A.
budding
B.
root cutting
C.
seeds
D.
stem cutting
Answer: C
22.
The power rating of an electric machine is 100W. This machine
A.
can do 100J of work in 1 minute
B.
uses electric energy of 100J in 1 hour
C.
uses electric energy of 100J in 1 second
D.
can get heated after working for 199 seconds
Answer: C
23.
The way of controlling endoparasites in cattle is through
A.
rotational grazing
B.
early morning grazing
C.
dipping the animals
D.
spraying the animals with recommended pesticides
Answer: C
24.
which of the following statement about breathing in human is correct?
A.
The same amount of nitrogen, more carbon dioxide and less oxygen is breath out than breathed in
B.
The same amount of nitrogen, less carbon dioxide and less oxygen is breathed out than breathed in
C.
More nitrogen, more carbon dioxide and less oxygen is breathed out than breathed in
D.
same amount of nitrogen, more carbon dioxide and more oxygen is breathed in than is breathed out.
Answer: A
25.
An example of a metalloid is
A.
magnesium
B.
potassium
C.
phosphorus
D.
silicon
Answer: D
26.
A property of a material that makes it a good conductor of heat is its
A.
colour
B.
length
C.
nature
D.
volume
Answer: C
27.
Which of the following features are associated with dairy cattle? They
I. are lean with fairly long legs.
II. have well - shaped body conformation.
III. have well - develop udder.
IV. are generally humped.
A.
I and II only
B.
II and III only
C.
I,II and III only
D.
II,III and IV only
Answer: C
28.
In crop production, pests and parasites do not cause
A.
increase in yield
B.
total loss of crop
C.
stunted growth
D.
reduced market value
Answer: A
29.
The Easterlies are winds which blow.
A.
towards the pools
B.
from the poles to the equator
C.
along the equator
D.
into the sea
Answer: B
30.
The most appropriate time to transplant vegetable seedling is
A.
dawn
B.
midday
C.
sunrise
D.
sunset
Answer: D
31.
The main reason for trimming the side of a vegetable bed is to control
A.
run-off water
B.
leaching of nutrient
C.
breaking of bed
D.
soil erosion
Answer: A
32.
Which of the following chemical is toxic ?
A.
Potassium cyanide
B.
Sodium hydroxide
C.
Hydrogen peroxide
D.
Calcium oxide
Answer: A
Potassium cyanide
Potassium cyanide is a highly poisonous compound that is an inhibitor of many metabolic processes.
It is used for gold and silver extraction, in chemical analysis, to make other chemicals, and as an insecticide.
Sodium hydroxide
Also known as lye and caustic soda is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na+
and hydroxide anions OH−.
Sodium hydroxide is used in many industries: in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents, and as a drain cleaner
Hydrogen peroxide
A chemical compound with the formula H2O2. In its pure form, it is a pale blue, clear liquid, slightly more viscous than water
It is used as an oxidizer, bleaching agent and antiseptic
Calcium oxide
Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound. It is a white, caustic, alkaline, crystalline solid at room temperature.
Used in large quantities as building and engineering materials (including limestone products, cement, concrete, and mortar), as chemical feedstock, and for sugar refining.
33.
Ethanol may be preferred to mercury as a thermometric liquid because
A.
ethanol is colourless
B.
mercury has a higher specific heat capacity
C.
mercury wet glass.
D.
ethanol has a far lower freezing point
Answer: D
34.
One advantage of mulching is that it.
A.
may be a source of new weed species.
B.
acidifies the soil.
C.
improves soil texture.
D.
increases soil temperature.
Answer: A
35.
Farmers prefer to grow crops on loamy soils because loamy soils
I. usually contains large amountof plant nutrient
II. protect the crops from injury
III. have equal amounts of clay and sand
IV. hold plants firmly
Which of the statements above is/are correct?
A.
I only
B.
I and II only
C.
I and III only
D.
I and IV only
Answer: A
36.
In beta decay, the particle emitted is
A.
electron.
B.
neutron.
C.
helium nucleus.
D.
hydrogen atom.
Answer: A
37.
The hair on the skin of pig is known as
A.
bristle
B.
brush
C.
feather
D.
fur
Answer: A
38.
A rigid bar that is supported at a point which turning occurs is
A.
lever.
B.
pulley.
C.
wheel and axle.
D.
inclined plane.
Answer: A
A lever is a simple machine that consists of a bar that pivots on a fixed support or fulcrum
A pulley is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable or belt, or transfer of power between the shaft and cable or belt
The wheel and axle consists of a wheel attached to a smaller axle so that these two parts rotate together in which a force is transferred from one to the other. A hinge or bearing supports the axle, allowing rotation. It can amplify force; a small force applied to the periphery of the large wheel can move a larger load attached to the axle
An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle, with one end higher than the other, used as an aid for raising or lowering a load
Other Types Of Simple Machines
A wedge is a simple machine that almost looks like a ramp or an inclined plane. It is actually made up of two inclined planes joined together
A screw is simply an inclined plane around a cylinder.Screw has ridges winding around it. The correct term for the ridges (or grooves) around the shaft or cylinder is the thread.
39.
The unit of electric charge is
A.
ampere
B.
coulomb
C.
ohm
D.
volt
Answer: B
40.
An example of a non-ruminant herbivore is
A.
cow
B.
goat
C.
poultry
D.
rabbit
Answer: D
41.
Which of the following processes increase on a hot day?
A.
digestion
B.
egestion
C.
sweating
D.
respiration
Answer: C
42.
The sedimentary rock is also referred to as
A.
stratified rock
B.
slated rock
C.
silical rock
D.
separated rock
Answer: A
43.
Which of the following functions are associated with mammalian skeleton? It...
I. stores calcium and phosphates.
II. protects vial internal organs.
III. produce red blood cells.
IV. stores proteins.
A.
I and II only
B.
III and IV only
C.
I, II, and III only
D.
II, III and IV only
Answer: C
44.
Which of the following mineral is not needed by crop in large quantities ?
A.
Calcium
B.
Iron
C.
Nitrogen
D.
Phosphorus
Answer: B
Crops obtain most of their carbon and oxygen from the air. Hydrogen is obtained from soil water. Carbon dioxide is especially important for plant growth. It is taken up by the plant from air through pores in the green leaves and combines with hydrogen from soil water, to form carbohydrate and other plant substances by energy from sunlight by the process of photosynthesis
Out of the 13 nutrients taken from the soil, Nitrogen, Phosphorus and Potassium are used in large quantities and hence known as primary nutrients.
Calcium, Magnesium and Sulphur are needed in moderate to small quantities but they play an important role in formation of plant tissues. These are known as secondary nutrients
The remaining are needed in very small quantities and are known as micro-nutrients. Plants need 16 elements to grow. They get these from air, water and soil.
| Type | Nutrients | Source |
| Macro-nutrient | Carbon | Air & Water |
| Macro-nutrient | Hydrogen | Air & Water |
| Macro-nutrient | Oxygen | Air & Water |
| Macro-nutrient | Nitrogen | Soil |
| Macro-nutrient | Phosphorus | Soil |
| Macro-nutrient | Potassium | Soil |
| Micro-nutrient | Calcium | Skeleton Elements |
| Micro-nutrient | Magnesium | Fertilizers and Manures |
| Micro-nutrient | Sulphur | Fertilizers and Manures |
| Micro-nutrient | Iron | Fertilizers and Manures |
| Micro-nutrient | Manganese | Fertilizers and Manures |
| Micro-nutrient | Boron | Fertilizers and Manures |
| Micro-nutrient | Zinc | Fertilizers and Manures |
| Micro-nutrient | Copper | Fertilizers and Manures |
| Micro-nutrient | Molybdenum | Fertilizers and Manures |
| Micro-nutrient | Chlorine | Fertilizers and Manures |
45.
The following materials are conductors of electricity except
A.
blood
B.
copper
C.
mica
D.
water
Answer: C
46.
The function of the valves in the veins of humans is to
A.
prevent blood from flowing backwards
B.
exchange nutrients between blood and cells
C.
stop extreme expansion of the wall
D.
direct blood away from the heart
Answer: A
Valves in veins prevent blood from flowing in the reverse (backward) direction.
Venous valves typically consist of two elastic flaps of tissue that open and close in alternation.
Muscles constantly contract and release, causing the blood to flow toward the heart. The valves open, allowing the blood to flow, and close, stopping the blood from flowing backwards.
47.
A precaution that has to be taken when using a liquid-in-glass thermoter is
A.
holding the bulb in hand when is use
B.
taking the readings quickly before thermal equilibrium is attained
C.
ensuring that the bulb is fully immersed in the surface
D.
ensuring that the bulb touches the vessel containing the surface
Answer: C
48.
Which of the following animals is warm blooded ?
A.
Agama Lizard
B.
Wall gecko
C.
Cockroach
D.
Mouse
Answer: D
49.
Liming as a method of maintaining soil fertility aims at...
A.
removing excess water from the soil
B.
reducing soil aggregation
C.
reducing soil acidity
D.
reducing soil alkalinity
Answer: C
50.
Galvanized roofing sheets are iron coated with a thin layer of...
A.
gold
B.
plastic
C.
tin
D.
zinc
Answer: D
THEORY QUESTIONS
1.
(a) (i) State the method of preparing a salt from each of the following pairs of substances:
(α) dilute tetraoxosulphate(VI) acid and dilute sodium hydroxide;
(β) lead(II) trioxonitrate(V) and sodium chloride.
(ii) Write a balance equation for the reaction between lead(II) trioxonitrate(V) and sodium chloride.
(b) (i) What are tidal waves?
(ii) State four ways in which water could be contaminated.
(c) (i) State two ways in which legumes are important in crop production.
(ii) State three advantages of crop rotation.
(d) (i) State three qualities of a good thermometric liquid;
(ii) Give two precautions that must be taken when using a liquid-in-gas thermometer.
Solutions will soon be uploaded. Thank you.
2.
(a) (i) Define each of the following terms:
(α) compound;
(β) mixture.
(ii) State two differences between an element and a compound.
(b) Explain each of the following terms:
(i) greenhouse effect;
(ii) climate change.
(c)(i) What is electrical rectification?
(ii) Using simple wave diagram, explain half-wave rectification.
(d) State one way in which each of the following environmental factors is important to the life cycle of crops:
(i) rainfall;
(ii) temperature;
(iii) sunshine;
(iv) wind.
Solutions will soon be uploaded. Thank you.
3.
(a) (i) Give three reasons why goats are not normally kept under the intensive system of management.
(ii) Name two diseases that affect rabbits.
(b) (i) Draw the structure of 11Na+.
(ii) State two differences between organic compound and inorganic compounds.
(c) (i) What are decomposer?
(ii) Name three common decomposers in an ecosystem.
(d) (i) Name three structures in the middle ear that help in the transmission of sound waves;
(ii) Mention two ways in which earmuffs are important.
Solutions will be uploaded soon. Thank you.
4.
In an experiment to investigate the effect of sugar solution on onion tissues, pieces of epidermal tissues of equal sizes were peeled from inner fleshy leaves of onions. A number of the tissues were placed in six test tubes containing sugar solutions of different concentration. After a few hours the cells of the tissues were observed to be deformed. The percentage of the deformed cells in the various solutions are presented in Table 1 below.
Study the diagram carefully and answer the questions that follow.
(a) Plot a graph of percentage of deformed cells on vertical axis and concentration of sugar solution on the horizontal axis.
(b)Draw and label a diagram to show the appearance of the onion cell in the
(i) 0.5% concentrated solution;
(ii) 2.5% concentrated solution.
(c) Give one reason each for the appearance of the cells draw in (b).
(d)State two environmental factors that could have the same effect on a plant as the concentrated sugar solution.
Solutions will soon be uploaded. Thank you.
5.
(a) An electrical appliance rated 1.5kW, 240V is left running for hours. Calculate the
(i) current drawn;
(ii) electrical energy consumed.
(b) (i) In what two ways does mulching help to conserve the soil?
(ii) Give two examples of mulching materials.
(c) (i) What is pollution?
(ii) List three major atmospheric pollutants.
(d) (i) State two benefits of each of the following minerals to the human body:
(α) potassium;
(β) calcium.
(ii) Name one source of each of the minerals listed in(d)(i).
Solutions will be uploaded soon. Thank you.