KUULCHAT
SCIENCE MOCK
OBJECTIVE TEST
1.
The relative proportion of sand, silt and clay in a given sample of soil is soil
A.
profile.
B.
porosity.
C.
structure.
D.
texture.
2.
Which of the following parasites is a plant?
A.
Aphid
B.
Dobber
C.
Flea
D.
Jigger
3.
Photosynthesis is important to living organisms because it produces
A.
glucose and oxygen.
B.
glucose and carbon dioxide.
C.
oxygen and carbon dioxide
D.
water and carbon dioxide.
4.
The shape of a child’s nose may resemble that of the mother due to
A.
heredity
B.
similarity
C.
reflection
D.
familiarity
E.
attraction
5.
An example of a legume is
A.
groundnut.
B.
millet
C.
sorghum
D.
sweet potato
6.
Which of the following substances is an air pollutant?
A.
Water vapour
B.
Oxygen
C.
Nitrogen
D.
Hydrogen sulphide
7.
Which of the following substances is a mixture?
A.
Water
B.
Sodium chloride
C.
Sodium chloride solution
D.
Iron filing
8.
A metal displaces 5.0 cm3 of water when completely immersed in water. If the mass of the metal is 35.0 g, calculate its density.
A.
7.0 g cm-3
B.
30.0 g cm-3
C.
40.0 g cm-3
D.
175.0 g cm-3
9.
The efficiency of a machine is given by the ratio
A.
B.
C.
D.
E.
10.
Which of the following structures is not part of the central nervous systems?
A.
Brain
B.
Spinal cord
C.
Nerves
D.
Veins
11.
Which of the following is a physical change?
A.
Heating of sugar
B.
Heating of sulphur and iron filing
C.
Boiling of water
D.
Burning of magnesium ribbon
E.
Heating of potassium chlorate
12.
Mosquito pupa breathes through tubes called
A.
trachea.
B.
siphon.
C.
lungs.
D.
gills.
13.
Use the figure below to answer the question below.
A rigid bar is balanced horizontally at a point by placing a rock on the bar as shown.
Which of the parts labelled represents the pivot?
A.
P
B.
Q
C.
R
D.
X
E.
Y
14.
Which of the following enzymes helps in digestion of protein in the human stomach?
I. Proteases
II. Amylase
III. Lipases
A.
I only
B.
II only
C.
I and II only
D.
II and III only
15.
The current flowing through a resistor of resistance 10 ohms is 2.5 A. What is the potential difference between the two terminals of the resistor?
A.
4V
B.
12.5 V
C.
25 V
D.
50 V
16.
Chlorine gas in a example of
A.
an atom.
B.
an element.
C.
a compound.
D.
a molecule.
17.
The number of oxygen atoms present in three molecules of carbon dioxide is
A.
3.
B.
4.
C.
5.
D.
6.
18.
A transistor is said to operate in an active region when
A.
one p-n junction is forward biased and the other is reverse biased.
B.
base-emitter junctions are reverse biased.
C.
both p-n junctions are reverse biased.
D.
base-collector junction is forward biased.
19.
In a third-class lever the
A.
pivot is between the load and effort
B.
pivot is absent
C.
load is between the effort and pivot
D.
effort is between the load and pivot
20.
The volume of a metal ball was determined by dropping it into a measuring cylinder containing 20 cm3 of water and the water level rose to 35 cm3. If the mass of the ball is 35 g, calculate its density.
A.
1.0 g cm-3
B.
1.6 g cm-3
C.
1.8 g cm-3
D.
2.3 g cm-3
21.
A rheostat is used in an electric circuit in order to
A.
increase electric current only.
B.
decrease electric current only.
C.
keep electric current constant.
D.
increase and decrease electric current.
22.
Which of the following structures contain cellulose?
A.
Cell wall
B.
Cell membrane
C.
Chloroplast
D.
Mitochondrion
23.
The instrument used to measure current in an electric circuit is the
A.
ammeter.
B.
anemometer.
C.
barometer.
D.
thermometer.
E.
voltmeter
24.
The form of energy produced from the nucleus of an atom is termed
A.
chemical energy
B.
mechanical energy
C.
nuclear energy
D.
thermal energy
25.
The ear is the organ for detecting
A.
colour.
B.
heat.
C.
scent.
D.
sound.
26.
The function of the hair in the nose of humans is to
A.
make breathing easier.
B.
keep nose moist.
C.
filter dust from the air breathed in.
D.
keep the nose warm.
27.
A boy who is seventeen years old is an
A.
adult
B.
adolescent
C.
old person
D.
infant
28.
Chlorine gas is passed through water during filtration to
A.
kill germs.
B.
cause suspended particles to settle.
C.
soften the water.
D.
give taste to the water.
29.
Which of the following is the function of the hair in the nose? It
A.
keeps the nose warm
B.
makes breathing easier
C.
keeps the nose moist
D.
prevents carbon dioxide from entering the body
E.
filters dust from the air breathed in
30.
Which of the following is not a communicable disease?
A.
smallpox
B.
chicken pox
C.
influenza
D.
pneumonia
E.
Tuberculosis
31.
Energy stored in food is referred to as
A.
chemical energy.
B.
heat energy.
C.
solar energy.
D.
kinetic energy.
32.
The force which is able to hold light objects on the surface of liquids is called
A.
surface tension
B.
friction
C.
capillarity
D.
viscosity
E.
cohesion
33.
The fifth planet from the sun in the solar system is
A.
Jupiter.
B.
Mars.
C.
Neptune.
D.
Venus.
34.
Use the information below to answer the question that follow.
A solid X reacted with a liquid Y to form a salt and water only. A portion of liquid Y turned blue litmus paper red. Solid X did not dissolve when a portion of it was placed in water and stirred.
If red litmus paper is placed in liquid Y, the colour of the paper will
A.
remain the same.
B.
change to blue.
C.
change to purple.
D.
become brighter.
35.
An example of a first class lever is
A.
bottle opener.
B.
crow bar.
C.
wheel barrow.
D.
fishing rod.
36.
The S.I unit for measuring the work done by a force is
A.
J.
B.
K.
C.
N.
D.
W.
37.
The function of the white blood cells in humans is to
A.
produce haemoglobin.
B.
ensure blood clot during an injury.
C.
produce antibodies to engulf disease-causing organisms.
D.
produce digestive enzymes.
38.
Which of the following statements about plants is true?
I. Most plants show movement
II. Green plants manufacture their own food
III. All animals depend directly on plants for food
A.
I only
B.
II only
C.
III only
D.
I and II only
E.
II and III only
39.
The part of the human ear which collect and direct sound waves is the
A.
ear drum.
B.
ear lobe.
C.
ear canal.
D.
semi circular canal
40.
The farm animal which has crop as part of its digestive system is the
A.
fowl.
B.
goat.
C.
pig.
D.
sheep.
THEORY QUESTIONS
1.
a)
i)
Mention four female sexual characteristics of a human being.
ii)
Name two sense organs in mammals
iii)
Give one function of each of the sense organs named
b)
Define each of the following terms:
i)
compound
ii)
mixture
c)
List the particles that make up an atom.
d)
State the energy changes that take place in each of the following processes.
i)
An orange falls from a tree to the ground
ii)
A carpenter hits a nail with a raised hammer.
2.
a)
Name four weather measuring instruments.
b)
Name the stages in the life cycle of a mosquito.
c)
i)
List two properties of water.
ii)
Explain why it is advisable to wash clothes with soft water.
d)
State three ways in which soil profile is important.
3.
(a)
(i)
What is respiration?
(ii)
Name the types of respiration that occur in humans.
(b)
List three ways of maintaining soil fertility.
(c)
(i)
Write the systematic name of each of the following chemical compounds:
(α)
FeS;
(β)
SO2;
(γ)
CO2.
(ii)
Give one reason why copper, silver and gold are mostly used in making ornaments and jewellery.
(d)
(i)
What is a fuse?
(ii)
Explain why a fuse is used in an electrical circuit.
4.
a)
i)
What is technology?
ii)
State one use of technology in communication.
b)
Write and balance each of the following chemical equations:
i)
Fe + O2 → Fe2O3;
ii)
Na + Cl2 → NaCl;
iii)
H2 + O2 → H2O.
c)
State one funtion of each of the following components of a typical cell:
i)
nucleus;
ii)
chloroplast;
iii)
mitochondrion.
d)
Mention four cultural practices in vegetable crop production.
e)
Name two agencies in food safety and quality assurance in Ghana.
5.
a)
i)
Explain the following terms as applied to machines:
α)
work input;
β)
work output.
ii)
State one factor that limits work output for a given work input in a simple machine.
b)
i)
What is chloroplast?
ii)
Differentiate between aerobic respiration and anaerobic respiration.
c)
State the colour change that would occur when blue litmus paper is dipped onto a solution of:
i)
α)
vinegar;
β)
wood ash.
ii)
Name the products formed when hydrochloric acid reacts with sodium hydroxide.
d)
List two benefits of vegetables to humans.
6.
(a)
Define
(i)
self-pollination
(ii)
cross-pollination
(b)
State two ways in which cross-pollinated plants are better than self-pollinated plants.
(c)
Sodium chloride is prepared by the reaction between dilute hydrochloric acid and sodium hydroxide.
(i)
Write a balanced equation for the reaction.
(ii)
What is the name given to this reaction?
(d)
Describe an experiment to show that pressure acts in all directions in a liquid.