Science topic on Buoyancy for Std, IX of the NCERT board.

2. A building collapsing

3. Ship

4. Iceberg

5. Leaves falling from the tree

6. Cork

7. Apple falling from the tree

8. Ball

9. Man jumping off the cliff

10. Ice cubes in a glass

11. Man falling

12. Separate the above examples into
positive and negative examples

13. What are the essential characteristics
of positive examples ?

14. How are the positive examples
different from the negative examples ?

15. Define the concept in your own words

16. The objects float on water due to a
upward force or thrust called
buoyancy exerted by the water

17. Eggs in a bowl

18. Lifebuoy

19. Toy duck

20. Coins on a table

21. Man floating

22. Why are some examples negative

23. Why are some examples positive

24. State some more positive examples of
your own

25. What came to your mind when you
first came across the positive and
negative examples

26. Did any example confuse you ?

27. 1.downward force > upward force
2. mass per unit volume of the object (density)
3.density of the fluid
why does a coin sink and a cork float ?