Water Precipitation Notes Water Cycle The total amount

Water Cycle • The total amount of water on our planet is always the

Water Cycle • Evaporation: water changing form from liquid to vapor (gas) • Condensation:

• Turn to page 55 in your textbook, and draw a diagram of

Humidity • Humidity: a measure of how much water vapor is in the air

Condensation • Dew point: the temperature at which condensation begins – If the dew

Clouds • Clouds form when water vapor in the atmosphere condense to form liquid

Clouds • Many different types of clouds depending on altitude and shape • Shape

Precipitation • When cloud droplets or ice crystals get heavy enough, they fall to

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Water & Precipitation Notes

Water Cycle • The total amount of water on our planet is always the same, it is not created or destroyed • Water Cycle: Water simply moves through the atmosphere, the oceans, the land, and living things in a constant cycle

Water Cycle • Evaporation: water changing form from liquid to vapor (gas) • Condensation: opposite of evaporation, water changing form from vapor to liquid • Precipitation: water that falls from clouds to the Earth’s surface (rain, snow, sleet, hail, etc)

• Turn to page 55 in your textbook, and draw a diagram of the Water Cycle in your notebook

Humidity • Humidity: a measure of how much water vapor is in the air • Psychrometer: an instrument that measures humidity • Important! Cool air holds less water than warm air • Relative Humidity: the percentage of water in the air compared to the maximum amount of water the air can hold

Condensation • Dew point: the temperature at which condensation begins – If the dew point is above freezing, liquid droplets form – If the dew point is below freezing, ice crystals form • Dew: liquid water condensed on Earth’s surface • Frost: ice crystals condensed on Earth’s surface

Clouds • Clouds form when water vapor in the atmosphere condense to form liquid droplets or ice crystals of water • As air cools, the amount of water it can hold decreases, water forced out of the air forms clouds! • Cloud droplets and ice crystals form around tiny particles of salt, dust, and smoke in the air

Clouds • Many different types of clouds depending on altitude and shape • Shape – Cirrus: wispy clouds – Cumulus: fluffy clouds – Stratus: flat layers • Altitude – Alto- : high altitude – Fog: clouds at ground level

Precipitation • When cloud droplets or ice crystals get heavy enough, they fall to the Earth as precipitation – Rain: liquid precipitation – Sleet: small particles of ice – Freezing Rain: liquid rain that freezes when it lands on something cold – Snow: ice crystals – Hail: large pellets of ice, can get larger than baseballs!