1.12. Measurement of atmospheric pressure

Try these first

1. 1.

   What is atmospheric pressure?

   Hint

   Consider the weight of the air surrounding us.

2. 2.

   What device is used to measure atmospheric pressure?

   Hint

   This device uses a liquid to show pressure levels.

3. 3.

   What is atmospheric pressure?

   • Pressure of water
   • Pressure exerted by air
   • Pressure in a vacuum

   Hint

   Think about what surrounds us every day.

4. 4.

   True or False: Atmospheric pressure increases with altitude.

   • True
   • False

   Hint

   Consider where you feel less pressure.

5. 5.

   If a barometer shows a mercury column height of 760 mm at sea level, what atmospheric pressure does this correspond to in Pascals?

   Hint

   Use the conversion factor of mercury height to pressure.

6. 6.

   Describe the effect of altitude on human physiology and provide a rationale based on atmospheric pressure.

   Hint

   Consider how the body reacts to less air pressure and oxygen.