1) Which type of force acts at a distance? a) A contact force. b) Friction. c) A non-contact force. d) Air resistance. 2) Which is an example of friction being unhelpful? a) Lighting a match. b) Brushing your teeth. c) Using the brakes on a car. d) Wearing down bicycle tyres. 3) Which is an example of friction being helpful? a) Opening a jar. b) Causing an engine to overheat. c) Wearing down car tyres. d) Slowing down a racing car. 4) Which surface will cause the most friction? a) ice. b) tin foil.  c) towel. d) sugar paper. 5) Which statement is true? a) The rougher the surfaces, the less the friction. b) The rougher the surfaces, the more the friction. c) The smoother the surfaces, the more the friction. d) The roughness of the surface does not affect friction. 6) Which force comes from a magnet? a) Gravity. b) Magnetic field. c) Friction. d) Magnetism 7) Which of these is a magnetic material? a) Iron. b) Wood. c) Plastic. d) Cooper. 8) Which of these pairs of magnets will be attracted to one another? a) Bar magnet N / N b) bar magnet S / S c) bar magnet S / N d) circular magnet N / N 9) Which of the following uses an electromagnet? a) Fridge magnet. b) Speakers. c) Jewellery clasp. d) Compass.

Science Y3 U2: Forces and magnets AC

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