6-6 What is air pressure?
SWBAT: Explain air pressure and describe what affects it.
pressure: amount of force per unit of area
• The weight of the air in the atmosphere exerts pressure on Earth’s surface.
• Air pressure is affected by elevation, temperature, and water vapor.
• Air pressure is lower at higher elevations and at higher temperatures.
• Air pressure is greater at lower elevations and at lower temperatures.
• The more water vapor in the air, the lower is the air pressure.
pressure: amount of force per unit of area
• The weight of the air in the atmosphere exerts pressure on Earth’s surface.
• Air pressure is affected by elevation, temperature, and water vapor.
• Air pressure is lower at higher elevations and at higher temperatures.
• Air pressure is greater at lower elevations and at lower temperatures.
• The more water vapor in the air, the lower is the air pressure.