What is wind and heat?What is wind and heat?

Name two factors that Name two factors that affect evaporation.affect evaporation.

What is humidity?What is humidity?

The amount of water The amount of water vapor in the air.vapor in the air.

Name the four elements of Name the four elements of weatherweather

1. Wind1. Wind2. Temperature2. Temperature3. Humidity3. Humidity4. Air Pressure4. Air Pressure

What is precipitation?What is precipitation?

Moisture that returns to Moisture that returns to the earth’s surface from the earth’s surface from the atmosphere. the atmosphere.

Rain, sleet, hail, snowRain, sleet, hail, snow

Name 4 forms of Name 4 forms of precipitationprecipitation

What are clouds?What are clouds?

They are collections of They are collections of tiny droplets of water or tiny droplets of water or ice.ice.

They form when water They form when water vapor molecules vapor molecules condensecondense..

00°C°C=freezing =freezing 100100°C°C=boiling=boiling

Give the freezing and Give the freezing and boiling temperatures for boiling temperatures for the Celsius scalethe Celsius scale

What is winter?What is winter?

The north pole is tilted The north pole is tilted away from the sun. away from the sun.

The sun is low in the sky.The sun is low in the sky.What season is it?What season is it?

COLDCOLD

A ____ front will bring stormy A ____ front will bring stormy weather and cooler weather and cooler temperatures.temperatures.

What causes seasons?What causes seasons?

The earth’s tilt.The earth’s tilt.The earth’s revolution The earth’s revolution

(path around the sun)(path around the sun)

What is a weather What is a weather forecast?forecast?

A prediction of the A prediction of the weather to come.weather to come.

What is a meteorologist?What is a meteorologist?

A person who studies the A person who studies the weather.weather.

What are day and night?What are day and night?

They are caused by the They are caused by the earth’s rotation earth’s rotation (spinning).(spinning).

What is summer?What is summer?

The north pole is tilted The north pole is tilted toward the sun.toward the sun.

The sun is high in the sky.The sun is high in the sky.What season is it in the What season is it in the

northern hemisphere?northern hemisphere?

Poles and the EquatorPoles and the Equator

Air masses form over Air masses form over the… the…

What is the Fahrenheit What is the Fahrenheit scale?scale?

3232° ° is the freezing is the freezing temperaturetemperature

At 212At 212°°, water will boil, water will boil

What is land and water?What is land and water?

The Sun’s energy The Sun’s energy directlydirectly heats the _____ heats the _____ and _____, not the and _____, not the atmosphere.atmosphere.

What is air pressure?What is air pressure?

The force put on an area The force put on an area by the weight of the air by the weight of the air above it. above it.

A barometer is used to A barometer is used to measure this force.measure this force.

The water cycleThe water cycle

The earth uses the same The earth uses the same water over and over again.water over and over again.

Evaporation, condensation Evaporation, condensation and precipitation are part of and precipitation are part of this process.this process.

What is condensation?What is condensation?

This happens when water This happens when water vaporvapor changeschanges to liquid to liquid water.water.a. Evaporationa. Evaporationb. Condensationb. Condensationc. Saturationc. Saturation

Solid, liquid, gasSolid, liquid, gas

Name the 3 states of Name the 3 states of water.water.

EvaporationEvaporation

This happens when liquid This happens when liquid water changes to a gas. water changes to a gas.

Air MassesAir Masses

They change our weatherThey change our weatherThey form over the poles They form over the poles

and the equatorand the equatorThey are very large They are very large

bodies of airbodies of air