Buoyancy and Flight

A crossword on Buoyancy and flight.

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Across

4. The opposite of weight?

8. A submarine uses this to float and sink?

9. The force that is the opposite of thrust?

10. What keeps are hair up when we are underwater?

11. What engines use fuel and air?

12. What the hulls of ships are filled with?

Down

1. What seaplanes use to float?

2. How much does a 747 weigh?

3. What buoyancy does an object have when it is denser than water?

5. Who said that gravity bends time and space?

6. The buoyancy of an object in water depends on the.... and density.

7. What is was the fastest airplane in the world?

8. Who was the mathematician who was the scientist that dealt with the way fluids?

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