Air Pressure

Low pressure will usually bring what kind of weather?

• Sunny
• Calm
• Stormy

Pressure is the effect of

• the weight of all the air above pressing down
• water vapor in the atmosphere
• greenhouse gases
• solar radiation

High pressure will usually bring what kind of weather?

• clear and dry
• cloudy and wet

High pressure will usually bring what kind of weather?

• clear and dry
• cloudy and wet

Which weather condition will most likely occur when the atmospheric pressure in an area begins falling?

• dry
• cold
• rainy
• sunny

_______ pressure systems are characterized by fair weather.

• High
• Low

Air has no weight.

• True

• False

Air is made up of a mixture of many different kinds of gases.

• True

• False

What causes winds?

• differences in precipitation
• differences in humidity
• differences in air pressure

Instruments used to measure air pressure are called

• thermometers
• hygrometers
• hydrometers
• barometers