Describe the following concepts, and fully answer the short answer questions.

Concepts:

-Density

-Weight density

-Pressure

-Buoyant Force (BF)

-Archimedes Principle

-Flotation

-Boyle's Law

-Atmospheric Pressure

-Pascal's Principle

1. What happens to the volume of a loaf a bread that is squeezed? What happens to the mass of the squeezed bread? What happens to the density of the squeezed bread?

2. Ignoring the pressure of the atmosphere, if you swim twice as deep beneath the water's surface how much more water pressure is exerted on your ear drums? If you swim in salt water, is the pressure greater or less than in fresh water of equal depth?

3. Why is it inaccurate to saw that heavy objects sink and light objects float? Provide an example of a "heavy" object that can float, and a "light" object that will sink.

4. Describe how straws work. Why would a straw not work in outer space or on the moon?

5. What is Pascal's Principle? In what way is a hydraulic press/lift similar to a lever or a see-saw?

6. Why is a soda can in an airplane more likely foam over when opened than a soda can on the ground?