air pressure and the atmosphere

________is the instrument used to measure air pressure.

• barometer
• thermometer
• mercury
• watch

Atmospheric pressure is the effect of

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

Air pressure is greater _______.

• at the top of the mountain
• at the bottom of the mountain
• at the center of the mountain

Density of air is greater ________.

• at the top of the mountain
• at the bottom of the mountain
• at the center of the mountain

What is altitude?

• how much something weighs
• the distance above sea level
• how big something is
• how far away something is

Which level of the atmosphere do you see weather, clouds, rain, etc?

• troposphere

• thermosphere

• mesosphere

• exosphere

As altitude (height) increases, air pressure

• increases

• decreases

• stays the same

The 2 most abundant gases in the atmosphere are

• helium and nitrogen

• nitrogen and oxygen

• oxygen and helium

• argon and nitrogen

The density of the air ______ as you go up in the atmosphere.

• increases

• decreases

• stays the same

Air pressure is ___________ at sea level than on a mountain.

• greater

• weaker