Buoyancy & Surface tension

1. Why does a tennis ball float on water while a coin sinks?

2. What is the difference between buoyancy and surface tension?

3. The force that keeps a paperclip floating on water is ___________.

4. When we lift an object in water why does it seem lighter?

5. Buoyancy acts in both liquids & gases. True or False.

6. Submarines rise to the surface of the ocean because of  ___________.

7. What are the two forces acting on you while swimming?

8. Why can’t humans walk on water?

9. Soaps and detergents reduce the __________ of water.

10. Why is it possible to float in the dead sea?

11. Compare the buoyancy & surface tension of water, olive oil & vinegar.

____

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