What is the thin layer of air that surrounds Earth called?

• atmosphere

• troposphere

• stratosphere

• biosphere

In which layer of the atmosphere does most weather occur?

What kind of front forms when a warm air mass catches up to a cold air mass?

• a cold front

• a warm front

• a rain front

• a hot front

What instrument is used to measure air pressure?

• thermometer

• weather vane

• hygrometer

• barometer

What instrument is used to measure moisture in the air?

• thermometer

• weather vane

• hygrometer

• barometer

What instrument is used to measure temperature?

• thermometer

• weather vane

• hygrometer

• barometer

As you get higher in the atmosphere, the space between air particles ...

• decreases

• doesn't change

• increases

• masses

Energy from the _____ is trapped by gases in the air, causing the greenhouse effect.

• Earth

• sun

• barometer

• stratosphere

How is your day going?

• OK.

• Good

• Great

• Wonderful

• Horrible