CBSE Class 5 Science Energy and Work Assignment

1. The weight that we use on the lever is called_______________, the weight that we try moving is called________ and the point that gives support but does not move is the _________

2. A _________________ is a continuously moving lever.

3. Windlasses are used to raise and lower __________________.

4. The upward force exerted by a liquid is called _______ or __________________ .

5. Objects that float displace water ________________ to their weight.

6. Objects that sink displace water ________________ than their weight.

7. Two liquids of high density _____________, _________________.

8. Two liquids of low density. _____________, ___________________.

9. A nail ________________ in alcohol.

10. Two liquids which do not mix with each other ______________, ______________

11. An object that floats on water __________________

12. A substance that dissolves in water _____________

13. A substance that does not dissolves in water ________________.

14. An ________________ does not decrease work but makes it easier.

15. A ________________ is an inclined plane wrapped round a rod.

16. A simple machine used to hoist flags ________________

17. A simple machine used to join two blocks of wood ________________.

Give two examples for each of the following:

(i) First class of lever __________________, _______________

(ii) Second class of lever _______________, _________________

(iii) Third class of lever ________________, _________________

(iv) Wheel and Axle _________________, ___________________

(v) Inclined plane ________________, _______________________