Understanding Isobars and Air Pressure

What is the unit of measurement for atmospheric pressure?

• Pascals

• Millibars

• Atmospheres

• Torr

In which direction do winds blow in a low pressure system?

• Towards high pressure

• Towards low pressure

• Clockwise

• Counter-clockwise

What type of weather is usually associated with low pressure systems?

• Clear and sunny

• Cloudy and rainy

• Hot and dry

• Cold and snowy

How do low pressure systems swirl north of the equator?

• Clockwise

• Counter-clockwise

• Upward

• Downward

What letter is used to denote a high pressure system on a weather map?

• H

• L

• P

• C

True or False: Air pressure depends on the air temperature and density.

• True

• False

What happens to air in a high pressure system?

• It rises

• It sinks

• It stays still

• It evaporates

Which of the following is NOT a characteristic of low pressure systems?

• Cloudy weather

• Precipitation

• Clear skies

• Storms

What is the main factor that determines air pressure?

• Wind speed

• Temperature and density of air

• Humidity

• Altitude

What are isobars used for?

• Measuring temperature

• Identifying locations of high and low pressure systems

• Measuring humidity

• Identifying wind direction