General Science Quiz Questions & Answers
1. Why does a rider feel a tendency to fall when the horse starts running
of stops suddenly?
Ans: This is caused by inertia. When the horse starts running, the rider, being
at rest, falls back. When a running horse stops suddenly, the rider being in
motion has a tendency to fall ahead.
2. Why does a person carrying a bucket full of water in his right hand bend
towards the left?
Ans: He bends towards his left so that the centre of gravity falls within the
base. This enables him to keep up balance, otherwise he may fall.
3. Why does tea cool more rapidly in a saucer than in a cup?
Ans: In a saucer evaporation takes place more rapidly than in a cup. Cooling is
caused by evaporation.
4. Ice packed in sawdust does not melt quickly. Why?
Ans: Ice packed in sawdust does not melt quickly, because sawdust being bad
conductor, it cuts the heat rays.
5. Why do you heat a metal rim before fitting it to a wheel?
Ans: By heating, the rim expands and fits easily over a slightly bigger radius
than that of the rim. On being cooled it contracts and has a firm grip on the
wheel.
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