Light, Sound and Force Worksheet-8

Light, Sound and Force Worksheet-8

 

True or False:

  1. Mice bray.

  2. Dogs chirp.

  3. Frogs squeak.

  4. Lions croak.

  5. Snakes roar.

  6. Horses moo.

  7. Cats bark.

  8. Dogs mew.

  9. Sound that is soft and pleasant is called noise.

  10. Sound that is loud and unpleasant is called noise.

  11. A push or a pull is called sound.

  12. A push or a pull is called force.

  13. When two things touch each other, friction develops.

  14. When two things touch each other, noise develops.

  15. Friction is a special force that slows movements.

  16. Force can change the shape of the objects.

  17. Noise can change the shape of the objects.

  18. To move an object, the force of the push or pull should be greater than the force of friction.

  19. A wet floor is very slippery because there is very little  friction.

  20. When friction is very less, things slide.

  21. When friction is high, things don't move.

  22. To move an object, the force of the push or pull should be lesser than the force of friction.

  23. A wet floor is very slippery because there is very more friction.

  24. When friction is very high, things slide.

  25. When friction is less, things don't move.

  26. We would keep slipping off if there is no friction.

 

Answer:

  1. False

  2. False

  3. False

  4. False

  5. False

  6. False

  7. False

  8. False

  9. False

  10. True

  11. False

  12. True

  13. True

  14. False

  15. True

  16. True

  17. False

  18. True

  19. True

  20. True

  21. True

  22. False

  23. False

  24. False

  25. False

  26. True