Measuring Gas Pressure and Atmospheric Pressure

What is the pressure of air in the environment called?

• Atmospheric pressure

• Hydraulic pressure

• Vapour pressure

• Osmotic pressure

Which of the following devices are used to measure pressure?

• Barometer and manometer

• Thermometer and barometer

• Manometer and thermometer

• Thermometer and hydrometer

Gases are made up of a whole bunch of different atoms and molecules. In air, for example, we've got nitrogen, oxygen, argon, and carbon dioxide.

• True

• False

The ball pit analogy describes atmospheric pressure as being like a giant ball pit filled with ping pong balls. What does the weight of the balls above represent?

• The temperature of the air

• The pressure exerted by the air above us

• The movement of air

• The color of the sky

Why don't we feel the pressure of the air around us pushing on us?

What is the shape of the tube used to measure gas pressure in the described experiment?

(a)  

Why can't we use a U-tube to measure atmospheric pressure?

What device do we use to measure atmospheric pressure?

• Manometer

• Barometer

• Thermometer

• Hydrometer

If the pressure of the air inside a gas tank pushes the mercury apart 800 millimeters, what is the pressure of the gas inside the tank?

• 800 millimeters of mercury

• 80 millimeters of mercury

• 8,000 millimeters of mercury

• 8 millimeters of mercury

When using a U-tube to measure the pressure of a gas in a tank, what happens if you snap off the vacuum at the end of the U-tube?

• The height of the mercury increases

• The height of the mercury decreases

• The height of the mercury stays the same

• The mercury evaporates