MARKING SCHEME FOR JSS1 BASIC SCIENCE THIRD TERM CAT 1

SECTION A: OBJECTIVE TEST

1.(a) Force is any action that moves an object or alters its uniform motion in a given direction.

(2 marks)

(b) Uses of Force

It is needed to make objects move.
It prevents car wheels from slipping.
It makes it possible for the car to stop or slow down when the brakes are applied.
Friction between the sole of our feet and the ground makes it possible for us to walk.
Magnetic force is used to repair watches.
Magnetic force is applied to separate iron dust from solid non-magnetic substances like sulphur and sand.

(Any 3 at 1 mark each = 3 marks)

TOTAL = 5 MARKS

2.(a) \(GF = mg\)

(½ mark)

\(= 20 × 5 \)

(½ mark)

\(= 100N\)

(1 mark)

2.(b) Friction is the force that tries to stop a body from moving.

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