Science quizzes for kids -4

1.  Tough and strong aero plane can be damaged by small soft bird.
2. We hear echo in hills and valleys.
3. If we apply oil to hands, we can peel the fried groundnuts easily.
4. Water with salt and sugar is useful for treating dysentery.
5. Fish can survive even under lakes covered by ice.
6. Water becomes cool in earthen pot.
7. Temperature of food in thermos flask remains constant.
8. Food is preserved in Fridge.
9. Plastic bags are harmful to environment.
10. Organic fertilizers should used in place of chemical fertilizers.
11. Whistling sound is heard in Bamboo cluster.
12. Wires of guitar give better sound when tightened.
13. Soda-bi-carb is useful in stomachache.
14. Top sail of ship is seen first when approaching ship becomes visible.
15. Pendulum was used in old clocks to keep time.
16. Steel wires are placed in  bottom portion while casting slab.
17. It is difficult to pass string through needle hole if one eye is closed.
18. While doing water color painting initially only water is applied to all paper.
19. Pasted ticket can be removed easily if wetted by water.
20. Fan blades are bent slightly.