Atmospheric Pressure and Properties

If all of Earth's atmosphere were compressed into a ball, how would its size compare to Earth?

• It would be larger than Earth.

• It would be about the same size as Earth.

• It would be a small sphere next to Earth.

• It would be invisible.

How is the troposphere described in terms of its physical properties?

• A solid layer of gases.

• A fluid, similar to an ocean.

• A vacuum with scattered gases.

• A static, unmoving blanket of air.

What is the approximate force per square inch that the atmosphere presses down on our bodies?

• Less than 1 pound.

• About 5 pounds.

• Over 14 pounds.

• Exactly 10 pounds.

Why do humans not collapse under the immense pressure of the atmosphere?

• Our bones are strong enough to withstand the pressure.

• The air inside our bodies balances the external atmospheric pressure.

• We are constantly moving, which negates the pressure.

• The atmosphere's pressure is not actually that strong.