1. © Cambridge University Press 2003, 2006, 2008 7K multiple-choice extension test 1 Year 7 multiple-choice extension test 7K Forces and their effects For each question circle the correct answer.

2. © Cambridge University Press 2003, 2006, 2008 7K multiple-choice extension test 2 Question 1 The units of force are... A)cm B)g cm –3 C)kg D)N

3. © Cambridge University Press 2003, 2006, 2008 7K multiple-choice extension test 3 Question 2 A spring has a length of 3 cm. The spring extends by 2 cm for every 1 N weight that is hung on it. When the spring is 10 cm long the weight hung on its end is... A)3 N B)3.5 N C)4 N D)4.5 N

4. © Cambridge University Press 2003, 2006, 2008 7K multiple-choice extension test 4 Question 3 The table shows the volume and mass of a block of iron. The density of the iron block is... A)8 g cm –3 B)210 g cm –3 C)270 g cm –3 D)7200 g cm –3

5. © Cambridge University Press 2003, 2006, 2008 7K multiple-choice extension test 5 Question 4 The weight of an object is caused by... A)buoyancy B)density C)gravity D)speed

6. © Cambridge University Press 2003, 2006, 2008 7K multiple-choice extension test 6 Question 5 The diagram shows two forces acting on a block of wood. Choose the diagram A B C or D that shows the resultant force on the block of wood.

7. © Cambridge University Press 2003, 2006, 2008 7K multiple-choice extension test 7 Question 6 The diagram shows the force acting on a block of wood. Choose the diagram A B C or D that shows the force that would cancel out the force on the block of wood.

8. © Cambridge University Press 2003, 2006, 2008 7K multiple-choice extension test 8 Question 7 On the Earth a box has a mass of 6 kg and a weight of 60 N. On the Moon the force of gravity is one-sixth that on the Earth. The box is taken to the Moon. The mass and weight of the box on the Moon are... A)mass = 1 kg and weight = 10 N B)mass = 1 kg and weight = 60 N C)mass = 6 kg and weight = 60 N D)mass = 6 kg and weight = 10 N

9. © Cambridge University Press 2003, 2006, 2008 7K multiple-choice extension test 9 Question 8 The diagram shows a picture of a magnetic compass. When a piece of steel is brought near to a compass needle... A)nothing happens B)the compass needle is attracted to the piece of steel C)the piece of steel is repelled by the compass needle D)the compass needle is repelled by the piece of steel

10. © Cambridge University Press 2003, 2006, 2008 7K multiple-choice extension test 10 Question 9 3 kg of sugar has a weight of... A)3 N B)30 N C)3000 N D)300 N

11. © Cambridge University Press 2003, 2006, 2008 7K multiple-choice extension test 11 Question 10 The table shows the density of five different metals. Choose the metal that would sink when placed in liquid mercury. A)aluminium B)copper C)tungsten D)iron