Science

Question 1

1Insect-pollinated flowers are usually dull with no scent.

Easy

A. True B. False

Question 2

2The jelly-like substance where most cell activities take place is the

Easy

A. cytoplasm B. cell wall C. chloroplast D. nucleus

Question 3

3Releasing energy from food in cells is

Easy

A. sensitivity B. excretion C. growth D. respiration

Question 4

4The control centre of a cell is the ___.

Easy

Your answer (fill in the blank)

Question 5

5A solar panel converts

Easy

A. electrical to light energy B. heat to sound C. chemical to heat energy D. light energy to electrical energy

Question 6

6A machine does 1,200 J of work in 60 s. Find its power.

Medium

A. 72,000 W B. 0.05 W C. 1,140 W D. 20 W

Question 7

7Which human activity reduces water in rivers?

Medium

A. planting trees B. cutting down trees near river banks C. rainwater harvesting D. saving water

Question 8

8A boy runs 240 m in 30 s. Find his average speed.

Easy

A. 8 m/s B. 38 m/s C. 16 m/s D. 0.125 m/s

Question 9

9Dew forms on grass early in the morning because of

Easy

A. evaporation B. infiltration C. transpiration D. condensation

Question 10

10Breathing is different from respiration because breathing is

Medium

A. the same thing B. digestion C. the release of energy in cells D. the movement of air in and out of the lungs

Question 11

11An athlete runs 300 m in 40 s. Her average speed is ___ m/s.

Easy

Your answer (fill in the blank)

Question 12

12Unlike poles of magnets

Easy

A. repel B. become neutral C. attract D. disappear

Question 13

13Short-sightedness is corrected with

Hard

A. concave (diverging) lenses B. plane mirrors C. prisms D. convex lenses

Question 14

14Using V = IR, a current of 4 A through 10 Ω gives a voltage of ___ V.

Easy

Your answer (fill in the blank)

Question 15

15The SI unit of time is the

Easy

A. minute B. hour C. day D. second

Question 16

16A balanced diet helps the body to

Easy

A. stop growing B. grow and stay healthy C. become sick D. become weak

Question 17

17Burning is a reversible change.

Easy

A. True B. False

Question 18

18The instrument used to measure force is the

Easy

A. beam balance only B. ruler C. thermometer D. spring balance (newton meter)

Question 19

19The green pigment that traps light is

Easy

A. melanin B. carotene only C. haemoglobin D. chlorophyll

Question 20

20Acid rain is caused mainly by

Hard

A. carbon monoxide only B. oxygen C. water vapour only D. sulphur dioxide and nitrogen oxides in the air