The air surrounding the earth is called the _______.

• troposphere
• stratosphere
• atmosphere
• exosphere

________ describes weather conditions of a certain area over time.

• Temperature

• Climate

• Atmosphere

• Weather

The condition of the air is called _________.

• barometer

• forecast

• nitrogen

• weather

The instrument used to detect air pressure changes is called a ________.

• hygrometer
• anemometer
• barometer
• thermometer

A __________ is a weather prediction.

• forecast
• climate report
• temperature reading
• weather alert

A _________ is a scientist who studies weather.

• geologist
• meteorologist
• biologist
• oceanographer

________ is the gas that makes up most of the air.

• Helium
• Carbon Dioxide
• Nitrogen
• Oxygen

Weather happens in the _______ atmosphere.

• intergalaxic space

• higher

• lower

Gases exert pressure because they have _____.

• weight

• feelings

• liquids

• solid particles vibrating

Cold air is _______ than warm air.

• lighter
• warmer
• thinner
• heavier