8th science unit 2 part 1 weather in the atmosphere

Which of the following is NOT a fixed gas by percent (or an exact percent) in the atmosphere?

• carbon dioxide

  CO2

• nitrogen

  N2

• oxygen

  O2

• argon

  Ar

The gas that is most abundant in the atmosphere is _______.

• oxygen

• nitrogen

• carbon dioxide

• water vapor

The second most abundant gas in the atmosphere is _______.

• oxygen

• nitrogen

• carbon dioxide

• water vapor

Match the following

• carbon dioxide

• 21%

• nitrogen

• varies by location

• water vapor

• 0.04%

• oxygen

• 0.9%

• other gasses including argon

• 78%

Envelope of gasses that surround our planet (think of a coat)

• atmosphere

• clouds

• air pressure

• humidity

Because air has _______, it also has density and pressure.

• mass

• volume

• weight

• height

Which is the formula for density?

• D = v/m

• D = m/h

• D = m/v

• D = m/w

• Air pressure pushes ________ which is why we aren't crushed by the pressure.

• in all directions

• upward

• downward

• side to side

Gravity and temperature affect air pressure.

• true

• false

Air pressure _________ as altitude increases.

• decreases

• increases

• stays the same