Moisture in the Air

Moisture in the Air

Precipitation and Humidity

Poll

How do you feel about the rain?

• I LOVE it. Puddles. Yay.

• I HATE it. Yuck.

• Ehh. Don't care.

Water Cycle

• Precipitation

• Evaporation

• Condensation

Precipitation

Any type of solid or liquid water that falls from the atmosphere and reaches to the ground.

Types of Precipitation

• Rain

• Freezing Rain

• Sleet

• Snow

• Hail

Rain

water droplets in the clouds join together to form larger drops

Freezing Rain

• When the air is warm enough for the rain to fall as a liquid, but the surface of the earth is below freezing.

• The raindrops freeze as they hit the earth.

• This forms an icy glaze.

Sleet

• occurs when raindrops fall through the air that is below freezing

• These drops freeze on their way to the earth and land as ice pellets

Snow

• Forms when ice crystals in the clouds join together and fall to the earth

• The air must be at or below freezing for snow to fall

Hail

• Usually falls when weather is warm on the ground

• Hail is formed in a cycle of warmer air rising and ice pellets forming and dropping.

Multiple Choice

What forms when the air is warmer, but the surface of the earth is below freezing?

• snow

• sleet

• freezing rain

Multiple Choice

What forms when raindrops fall through air that is below freezing?

• rain

• freezing rain

• sleet

• snow

Dew and Frost

Humidity

Multiple Choice

True or False: Precipitation and humidity are the same thing.

• true

• false

Dew and Frost

• Dew and frost from from water vapor in the air

• Dew: when water vapor condenses on surfaces

• Frost: ice that forms without becoming a liquid first

Humidity Video

https://www.brainpop.com/science/earthsystem/humidity/

Humidity

• water vapor in the atmosphere

• temperature and air pressure influence the amount of humidity that the air can hold at any given time

Relative Humidity

• the actual amount of water vapor in the air compared with the amount that the air could hold at that temperature

• Warmer air can hold more water vapor than colder air

Multiple Choice

Water vapor in the atmosphere is called...

• air vapor

• humidity

• precipitation

Poll

How I understand the stuff from this lesson...

• I KNOW THIS STUFF LIKE THE BACK OF MY HAND.

• What did we just talk about?

• 50/50