Force and Its Effects

23 Grade 4 Integrated Science questions on Force and Its Effects, with worked marking schemes. 23 questions are available on this topic in full.

1. Question 1

   1 mark

   A magnet can attract

   A. wooden sticks

   B. paper clips made of plastic

   C. iron nails

   D. plastic cups

   (1 mark)

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2. Question 2

   1 mark

   A goalkeeper catches a fast-moving ball and it stops in his hands. In this case the force has:

   A. Started a still object moving

   B. Stopped a moving object

   C. Changed the object's colour

   D. Made the object bigger

   (1 mark)

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3. Question 3

   4 marks

   A shopkeeper finds it hard to push a heavy crate across a rough cement floor. Suggest TWO ways he can reduce the friction so that the crate moves more easily.

   (4 marks)

   Marking scheme

   Any two, 2 marks each: put the crate on wheels/rollers/trolley; apply oil or grease (a lubricant) between surfaces; smoothen/polish the floor or the bottom of the crate; place it on a smooth surface/mat. (Max 4 marks)

4. Question 4

   4 marks

   (a) What is a force?

   (b) Name TWO types of force.

   (4 marks)

   Marking scheme

   (a) A force is a push or a pull (that can make an object move, stop, change speed, direction or shape) - 2 marks. (b) Any two, 1 mark each: muscular force, gravity (gravitational force), friction, magnetic force. (Accept push and pull.) Max 2 marks.

5. Question 5

   1 mark

   Kicking a ball is an example of a

   A. magnetic force

   B. push force

   C. gravitational force

   D. pull force

   (1 mark)

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6. Question 6

   1 mark

   A pupil kicks a football during games. The kick is best described as a:

   A. Weight

   B. Push

   C. Pull

   D. Twist only

   (1 mark)

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7. Question 7

   1 mark

   The force that makes objects fall to the ground is called

   A. friction

   B. electricity

   C. gravity

   D. magnetism

   (1 mark)

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8. Question 8

   1 mark

   A mango falls from a tree and drops straight to the ground. The force that pulls the mango down is:

   A. Wind

   B. Gravity

   C. Friction

   D. Magnetism

   (1 mark)

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9. Question 9

   4 marks

   Friction is a force between two surfaces that are rubbing together.

   (a) Give ONE way friction is useful in our daily life.

   (b) Give ONE way friction can be a disadvantage.

   (4 marks)

   Marking scheme

   (a) Useful (any one): helps us walk without slipping; helps vehicles/bicycle brakes to stop; helps us grip/hold objects; lets us write on paper - 2 marks. (b) Disadvantage (any one): wears out shoes/tyres/machine parts; makes work harder/needs more energy; produces unwanted heat - 2 marks.

10. Question 10

    3 marks

    When you throw a stone straight up into the air, it slows down, stops and then falls back to the ground.

    (a) Name the force that pulls the stone back to the ground.

    (b) Explain why the stone comes back down instead of continuing upwards.

    (3 marks)

    Marking scheme

    (a) Gravity (gravitational force) - 1 mark. (b) The force of gravity pulls all objects downwards towards the earth, so the stone is pulled back to the ground - 2 marks.

11. Question 11

    1 mark

    A force can be described as a

    A. push or pull

    B. sound or light

    C. shape or weight

    D. colour or size

    (1 mark)

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12. Question 12

    1 mark

    Which of the following reduces friction?

    A. Applying oil or grease

    B. Adding sand

    C. Making the surface rough

    D. Adding water on the road

    (1 mark)

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13. Question 13

    3 marks

    A pupil tests different objects with a magnet: an iron nail, a plastic spoon, a steel pin and a wooden block.

    (a) List the objects that the magnet will attract.

    (b) What name is given to materials that are attracted by a magnet?

    (3 marks)

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14. Question 14

    1 mark

    Which one of the following surfaces would create the MOST friction when a box is dragged over it?

    A. A rough tarmac road

    B. A sheet of ice

    C. A polished floor

    D. A smooth glass table

    (1 mark)

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15. Question 15

    1 mark

    Friction is a force that

    A. opposes movement between surfaces

    B. produces light

    C. makes objects float

    D. makes things invisible

    (1 mark)

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16. Question 16

    1 mark

    Oil is put on a squeaky door hinge and the door then opens easily. Adding the oil helps by:

    A. Removing gravity from the door

    B. Increasing the weight of the door

    C. Reducing friction between the surfaces

    D. Adding magnetism to the door

    (1 mark)

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17. Question 17

    1 mark

    A ball rolling on rough ground slows down and finally stops. The force that slows the ball is:

    A. Gravity

    B. Push

    C. Friction

    D. Magnetic force

    (1 mark)

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18. Question 18

    1 mark

    A farmer moves a loaded wheelbarrow by holding the handles and drawing it towards himself. This action is a:

    A. Squeeze

    B. Twist

    C. Pull

    D. Push

    (1 mark)

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19. Question 19

    3 marks

    A force can do different things to objects. State THREE effects (things) a force can do to an object.

    (3 marks)

    Marking scheme

    Any three, 1 mark each: make a still object start moving; stop a moving object; change the speed of a moving object; change the direction of a moving object; change the shape of an object. (Max 3 marks)

20. Question 20

    1 mark

    A learner brings a magnet near several objects. Which object will the magnet attract (pull)?

    A. An iron nail

    B. A rubber band

    C. A plastic ruler

    D. A wooden pencil

    (1 mark)

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21. Question 21

    1 mark

    A child presses a lump of clay with the hands and it becomes flat. This shows that a force can:

    A. Make an object heavier

    B. Change the colour of an object

    C. Turn an object into a liquid

    D. Change the shape of an object

    (1 mark)

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22. Question 22

    4 marks

    Study the situations below and name the effect of force in each.

    (a) A pupil squeezes an empty plastic bottle and it changes shape.

    (b) A hockey player hits a moving ball and it turns and moves in a different direction.

    (4 marks)

    Marking scheme

    (a) The force changes the shape of the object (bottle) - 2 marks. (b) The force changes the direction of the moving object (ball) - 2 marks.

23. Question 23

    1 mark

    Pulling a rope in a tug-of-war is an example of a

    A. pull force

    B. frictional force

    C. magnetic force

    D. push force

    (1 mark)

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