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WASSCE Nov 2018 science

OBJECTIVE TEST

1.

An underground horizontal stem with nodes, internodes and scaly leaves is a

A.
bulb
B.
corm
C.
rhizome
D.
sucker

2.

The gas which gives a pop sound when a glowing splinter is brought close to is

A.
ammonia
B.
hydrogen
C.
oxygen
D.
carbon dioxide

3.

The unit of electric charge is

A.
ampere
B.
coulomb
C.
ohm
D.
volt

4.

Which of the following practices is not applicable to vegetable production?

A.
budding
B.
pruning
C.
staking
D.
weeding

5.

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

6.

Which of the following practices is a method of conserving the environment?

A.
use of pesticides
B.
overgrazing
C.
mining
D.
afforestation

7.

The pitch of a musical note is related to the note's

A.
loudness
B.
quality
C.
frequency
D.
intensity

8.

Picking is the method for harvesting

A.
cocoa
B.
cassava
C.
tomato
D.
yam

9.

The organism that occupies the second trophic level in a food chain is the

A.
primary consumer
B.
secondary consumer
C.
tertiary consumer
D.
producer

10.

Which of the following substances is an element?

A.
bauxite
B.
brine
C.
gold
D.
steel

11.

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

12.

Which of the following structures form the stomach of a goat?
A.
Reticulum, proventriculus, omasum, rumen
B.
Rumen, ventriculus, omasum, abomasum
C.
Rumen, reticulum, abomasum, rectum
D.
Abomasum, rumen, reticulum, omasum

13.

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

14.

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

15.

The diagram below illustrates the motor neurone. Study it carefully and answer the question below.

Which part of the neurone transmits impulses?

A.

II

B.

III

C.

V

D.

VII

16.

A bar magnet was moved towards a metal and the metal was attracted. It can be concluded that the metal is

I. a magnet

II. not a magnetic

III. a magnetic material

Which of the statements above is/are correct?

A.

I only

B.

II only

C.

III only

D.

I and III only

17.

The basic benefit of crop production is

A.

foreign exchange earnings

B.

income of the farmer

C.

raw material from industry

D.

food to feed people

18.

A gas soluble in water and lighter than air can be collected in the laboratory by

A.

upward displacement of air

B.

downward displacement of water

C.

downward displacement of air

D.

upward displacement of water

19.

A balloon inflated with hydrogen gas will rise in the air because

A.

it is weightless

B.

there is no upthrust on it

C.

the upthrust on it is more than its weight

D.

the air will carry it upward

20.

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

21.

The final stage of the purification of water for town supply is

A.

addition of chlorine

B.

flocculation

C.

aeration

D.

sedimentation

22.

The fundamental units which combine to give the unite of force are

A.

kilograme, second and ampere

B.

metre, ampere and second

C.

kilograme, metre and second

D.

metre, kelvin and second

23.

Bacteria are regarded as prokaryotae because they

A.

have cell walls made up of cellulose

B.

are unicellular organisms

C.

do not have membrane-bound organelles

D.

reproduce by producing gametes

24.

An example of a crop which is usually nursed before transplanting is

A.

okro

B.

carrot

C.

garden egg

D.

water melon

25.

The molecular formula of an alkene that contains four carbons atoms is

A.

C4 H4

B.

C4 H6

C.

C4 H8

D.

C4 H10

26.

The purpose of a seat belt in a vehicle is to

A.

enable the user jump to safety during accident

B.

prevent speeding by the driver

C.

enable the driver negotiate bends at high speed without causing accident

D.

prevent the user from being thrown forward on a sudden stop

27.

Which of the following characteristics is/are associated with the local breed of fowl? They

I. are slow growers

II. are normally kept on free range

III. have large body mass

A.

I only

B.

I and II only

C.

II and III only

D.

I, II and III

28.

A sample of KOH weighs 5.6g. Calculate the number of moles in the sample.

[K = 39; O = 16; H = 1]

A.

0.1

B.

0.2

C.

1.0

D.

5.6

29.

A gene is described as recessive when it

A.

expresses itself occasionally in certain generation

B.

does not express itself in any generation

C.

always expresses itself in every generation

D.

does not contribute to the survival of the organism

30.

A stain of oil paint in a cloth can be best be removed by applying

A.

warm water

B.

kerosene

C.

salt solution

D.

soap solution

31.

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

32.

Changes that occur in a girl at puberty includes

I. deepening of voice

II. breast enlargement

III. broadening of hips

Which of the statements above is/are correct?

A.

I only

B.

I and II only

C.

I and III only

D.

II and III only

33.

Which of the following statements about light is/are correct?

I. It travels through a medium in a straight line

II. It is a form of energy

III. It can be converted to heat energy

A.

I only

B.

II only

C.

I and II only

D.

I, II and III

34.

The reason for adding sulphuric acid during the preparation of esters is to

A.

speed up the rate of reaction

B.

act as reducing agent

C.

decompose the products

D.

dehydrate the reaction

35.

The pollutant which reacts with rain water to produce acid rain is

A.

Oxygen

B.

Nitrogen

C.

Nitrogen dioxide

D.

Carbon monoxide

36.

Diarrhoea could results in death due to

A.

evaporation

B.

dehydration

C.

hypertension

D.

hypotension

37.

The purpose of earthing in an electric circuit is to

A.

regulate the voltage

B.

protect the appliances

C.

protect the human being

D.

stabilize the current

38.

An example of a non-ruminant herbivore is

A.

cow

B.

goat

C.

poultry

D.

rabbit

39.

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

40.

Hazardous substances enter the human body through the

I. nose II. mouth III. skin

A.

I and II only

B.

I and III only

C.

II and III only

D.

I, II and III

41.

The charges carries in a semi-conductor are

A.

holes only

B.

protons only

C.

holes and electrons

D.

hoes and neutrons

42.

Pruning is a cultural practice undertaken in vegetable production to

A.

provide shade and protection

B.

remove diseased branches and leaves from plant

C.

prevent plants from falling

D.

prevent exposure of plants to rain, wind and sun

43.

Which of the following processes increase on a hot day?

A.

digestion

B.

egestion

C.

sweating

D.

respiration

44.

Which of the following statements about the pressure in a liquid is correct?

Pressure

A.

decrease with temperature

B.

is constant

C.

increase with depth

D.

is different at points at the same depth

45.

The number of elements in nitric acid is

A.

2

B.

3

C.

4

D.

5

46.

Which of the following animals is correctly matched with its young one?

A.

Sheep-calf

B.

Rabbit-kitten

C.

Goat-kid

D.

Pig-lamb

47.

Exhaled air may readily put off a lighted candle it contains high levels of

A.

carbon dioxide and moisture

B.

oxygen and moisture

C.

nitrogen and heat

D.

oxygen and nitrogen

48.

Oil spillage at sea results in

A.

rise in level of water

B.

ozone layer depletion

C.

coastal flooding

D.

death of fishes

49.

The radiation with the highest penetration power is

A.

x-ray

B.

gamma ray

C.

alpha particle

D.

beta particles

50.

The hair on the skin of pig is known as

A.

bristle

B.

brush

C.

feather

D.

fur