Give scientific reasons -2

1. Springs are used in buffers of railway wagons.
2. Gas filled balloon when rises up in the sky may burst.
3. Shoes of runners have spikes on them.
4. If we move our hand on cat’s skin, its hairs become straight
5. We know direction by seeing pole star in the sky.
6. Water in funnel rotates only in one direction.
7. Flowers are colored and scented.
8. Butterfly’s wings have shape and color like flower petals.
9. If we pour kerosene in water pond, mosquito larvae get killed.
10. Moon’s shape goes on changing with days.
11. Sun looks bigger and reddish while rising and at sunset.
12. We see mirage in sand
13. Bats can fly with ease even in dark night.
14. Mustered seeds burst when fried in oil.
15. The seed pods of some plants burst if become wet.
16. In strong wind, big trees fall but small shrubs remain safe
17. Fish die if taken out of water.
burned.
18. One can walk over red hot charcoal without harm to legs.
19. Water if heated in paper cone boils but the paper does not get
20. There is dew in winter.