Unit 3 Review 6th Grade

As altitude increases in the troposphere, air temperature

• stays the same
• decreases
• increases

Air presses

• only downward
• only upward
• in all directions
• in no direction

The higher in elevation you go, the ___________________ air there is.

• more
• less
• the same
• no air

Moist air is ___________ than dry.

• same density
• more dense
• less dense
• heavier

The atmospheric layer that contains the ozone layer is the

• troposphere
• stratosphere
• mesosphere
• exosphere

Winds that move across small areas and change direction and speed often are called

• global winds
• arctic winds
• local winds
• tropic winds

A wind is named according to where it

• is going
• comes from
• has no name
• stops

Wind direction is determined by

• an anemometer
• a barometer
• a wind vane
• a thermometer

Most of Earth's weather occurs in the

• stratoshpere
• mesosphere
• ionosphere
• troposphere

Oxygen is continually added to the atmosphere by

• outgoing gases by volcanic eruptions
• photosynthesis by green plants
• burning fossil fuels
• decomposition of organic wastes