1) Which force pulls things towards the Earth? a) air resistance b) gravity c) magnetism d) friction 2) Which forces slow things down? a) air resistance b) gravity c) friction d) water resistance e) magnetism 3) Forces cannot change the shape of an object. a) True b) False 4) Magnetism is a a) contact force b) non-contact force 5) Forces are measured in a) litres b) centimetres c) newtons d) kilometres 6) When there is more friction, the object moves a) slower b) faster 7) Air resistance is a a) contact force b) non-contact force 8) The larger the surface area, the _______ the object falls. a) faster b) slower 9) The independent variable is a) what you change b) what you measure 10) Water resistance acts in the same direction as the object is moving? a) true b) false 11) To refute an answer means you... a) disagree with it b) agree with it 12) The more pulleys you have the easier it is to lift an object, a) True b) False 13) Which mechanism has teeth a) pulley b) lever c) gear 14) A mechanism is ... a) a type of force b) a device that makes it easier to move things c) a device that makes it hard to move things d) used to lift heavy loads 15) The shorter the lever, the _______ it is to lift the load. a) easier b) harder 16) Select 3 types of mechanism. a) gravity b) air resistance c) lever d) pulley e) water resistance f) gear 17) A lever rests on the load. a) True b) False 18) If a gear is rotating anticlockwise, the gear next to it will rotate a) clockwise b) anticlockwise 19) Opposite poles on a magnet a) attract b) repel 20) I don't fly off the planet because of a) a force b) a mechanism

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