P5 Science · Chapter 20brightbit.net/worksheets

Friction & Gravity

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1.
What is friction?
(a) A force that pushes objects forward(b) A force that occurs when two surfaces rub against each other, opposing motion(c) A force that pulls objects towards the Earth(d) A force that makes objects float
2.
What is gravity?
(a) A force that pushes objects away from the Earth(b) A force that pulls objects towards the centre of the Earth(c) A force that makes objects move sideways(d) A force caused by rubbing two surfaces together
3.
Would there be more friction on a rough surface or a smooth surface?
(a) A smooth surface(b) A rough surface(c) Both have the same friction(d) Neither surface has friction
4.
Give TWO examples of how friction is useful in everyday life.
5.
Why do we put oil or lubricant on a squeaky door hinge?
(a) To make the hinge heavier(b) To increase friction so the door stays in place(c) To reduce friction so the hinge moves smoothly and quietly(d) To make the hinge rust-proof
6.
A ball is thrown upwards into the air. What force pulls it back down?
(a) Friction(b) Air resistance(c) Gravity(d) Magnetism
7.
What is air resistance?
8.
Why does a parachute help a skydiver land safely?
(a) The parachute makes the skydiver lighter(b) The parachute reduces gravity(c) The large surface area of the parachute increases air resistance, slowing the fall(d) The parachute pushes the skydiver upwards
9.
Explain why the soles of sports shoes are made with rough, textured patterns.
10.
If there were no gravity on Earth, what would happen? State TWO effects.

Answer key — P5 Science: Friction & Gravity

For parents. Step-by-step explanations for every question are free on brightbit.net.

1.(b) A force that occurs when two surfaces rub against each other, opposing motion
2.(b) A force that pulls objects towards the centre of the Earth
3.(b) A rough surface
4.Friction between shoes and the ground prevents us from slipping; friction between tyres and the road allows cars to grip and stop safely (also acceptable: friction allows us to hold objects, brakes use friction to stop vehicles)
5.(c) To reduce friction so the hinge moves smoothly and quietly
6.(c) Gravity
7.Air resistance is a type of friction caused by air pushing against a moving object; it slows the object down
8.(c) The large surface area of the parachute increases air resistance, slowing the fall
9.The rough, textured soles increase friction between the shoe and the ground, giving the athlete better grip and preventing slipping during running, jumping, or playing on the field
10.Objects and people would float away into space instead of staying on the ground; water would not flow downwards and rain would not fall (also acceptable: nothing would have weight, the atmosphere would drift away)

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Answer key — P5 Science: Friction & Gravity

For parents. Step-by-step explanations for every question are free on brightbit.net.

1.(b) A force that occurs when two surfaces rub against each other, opposing motion

2.(b) A force that pulls objects towards the centre of the Earth

3.(b) A rough surface

4.Friction between shoes and the ground prevents us from slipping; friction between tyres and the road allows cars to grip and stop safely (also acceptable: friction allows us to hold objects, brakes use friction to stop vehicles)

5.(c) To reduce friction so the hinge moves smoothly and quietly

6.(c) Gravity

7.Air resistance is a type of friction caused by air pushing against a moving object; it slows the object down

8.(c) The large surface area of the parachute increases air resistance, slowing the fall

9.The rough, textured soles increase friction between the shoe and the ground, giving the athlete better grip and preventing slipping during running, jumping, or playing on the field

10.Objects and people would float away into space instead of staying on the ground; water would not flow downwards and rain would not fall (also acceptable: nothing would have weight, the atmosphere would drift away)

Free worksheet from BrightBit · more free P1–P6 worksheets at brightbit.net/worksheets