Science Questions Essay

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1. Which machine could be made using bottle caps, cardboard, string and a piece of stick? A. gear B. incline plane C. lever D. wedge 2. Which is NOT true of machines? A. They are more efficient than man. B. They are helpful in doing work. C. They can be simple and complex. D. They can al be used by everyone. 3. In which situation is a man doing work? A. driving a motor car B. lying on a bed C. standing on a chair D. sitting on a bench 4. What does a breadfruit falling from a tree indicate? A. Gravity is acting on it. B. No force is acting on it. C. It contains water. D. It has no mass. 5. In which activity is friction being helpful? A. hammering a long nail into a concrete wall B. dragging a heavy bag up a rocky hill C. pulling a box over gravel D. walking on a slippery road in shoes with rough bottoms 6. The arrows show the direction in which each rider is travelling. Which rider needs to apply the greatest force to move along the road? [pic] A. I B. II C. III D. IV 7. Why is it dangerous for a car to run on tyres that are worn? Worn tyres ____________. A. make the car travel slower B. are less able to grip the road’s surface C. make the car feel cooler D. are likely to damage the road’s surface. The graph shows how long it took five basins with the same amount of water to completely dry out. Use it to answer items 8 -10. [pic] 8. Which basins were most likely kept in the same place? A. Z and W B. V and X C. Z and X D. V and W 9.

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