Weather Unit

What is needed to form a cloud?

• Water vapor, and warm temperatures
• Water vapor, and cool temperatures
• Water vapor, cool temperatures and condensation nuclei.
• Water vapor, warm temperatures and condensation nuclei.

Atmosphere pressure is a measure of which of the following?

• The total solar energy recieved by Earth
• The weight of air pushing down on earth
• The amount of water vapor in the air around Earth
• The speed of prevailing winds circling Earth

Water that collects on the Earth's surface and returns to bodies of water is called ___________.

• Condensation
• Evaporation
• Precipitation
• Run-off

______________ is the process by which water vapor in air becomes liquid water.

• Condensation
• Evaporation
• Humidity
• Precipitation

__________ is the measure of water vapor in the air. 

• Drought
• Precipitation
• Humidity
• Hail

Any form of water that falls from clouds and reaches Earth's surface is called ____________.

• Sleet
• Hail
• Precipitation
• Condensation

Process by which water molecules escape into air as water vapor

• Precipitation
• Evaporation
• Hail
• Sleet

Raindrops that freeze as they fall through the air

• Hail
• Sleet
• Freezing Rain
• Rain

Raindrops that freeze when they touch a cold surface

• Freezing Rain
• Hail
• Sleet
• Snow

Most common form of precipitation; liquid water

• Snow
• Sleet
• Rain
• Hail