Weather Terms

The Water Cycle

Weather Instruments

Earth-Sun Earth- Moon

10 10 10 10 10

20 20 20 20 20

30 30 30 30 30

40 40 40 40 40

50 50 50 50 50

A large body of air that has similar temperature

and moisture level

Air Mass

Water that falls to Earth

Precipitation

The process by which a liquid changes into a

gas.

Evaporation

The process by which a gas changes into a liquid

Condensation

The movement of water from the surface of Earth

into the air and back.

Water Cycle

Water that flows through underground rock

Groundwater

Precipitation that is liquid water

Rain

The boundary where a cold air mass moves

under a warm air mass.

Cold Front

A dangerous front that can bring many inches of

precipitation over a long period

Stationary Front

A large tropical storm that has winds of at least 74

miles per hour.

Hurricane

Measures temperatures in Celsius and Fahrenheit

Thermometer

Instrument that measures wind speed

Anemometer

Instrument that measures amount of rain fall.

Rain Gauge

Instrument that measures air pressure.

Barometer

Instrument the measures humidity level

Hygrometer

The imaginary line that Earth spins around as it

rotates

Axis

How long does it take for the Earth to revolve

around the sun?

365 ¼ days

How long does it take the Earth to rotate on it’s axis?

24 hours or one day

If the southern hemisphere is having the season of winter, what season is the northern

hemisphere having?

Summer

This causes the Earth to have seasons.

Earth’s Tilt

This is a small planetlike body that

orbits the Earth.

The Moon

This is the light source of the moon.

Sunlight reflecting off of the moon’s surface

What is the correct sequence of moon phases starting with new

moon?

New Moon, first quarter, Full Moon, third quarter

About how long does it take the moon to revolve around

earth?

About 29 days or one month

What causes the different moon phases?

The moon’s orbit around earth causes different amounts of sunlight to reflect off of the moon creating different shapes.