THE WATER CYCLETHE WATER CYCLE

WATER ON EARTHWATER ON EARTH

Water is important because:Water is important because: * Plants and animals need water to live.* Plants and animals need water to live. * Without water, there could be no rain * Without water, there could be no rain

or snow.or snow.

Most water on Earth is salt water found Most water on Earth is salt water found in the oceans.in the oceans.

FRESH WATERFRESH WATER

ONLY A LITTLE OF EARTH’S WATER IS ONLY A LITTLE OF EARTH’S WATER IS FRESH WATER.FRESH WATER.

FRESH WATER IS FOUND:FRESH WATER IS FOUND: AS ICE IN GLACIERSAS ICE IN GLACIERS RAIN OR SNOWRAIN OR SNOW RIVERS, STREAMS, PONDS, LAKESRIVERS, STREAMS, PONDS, LAKES GROUNDWATER: GROUNDWATER: FRESH WATER FOUND FRESH WATER FOUND

UNDER EARTH’S SURFACEUNDER EARTH’S SURFACE

Largest ocean on Earth – Pacific OceanLargest ocean on Earth – Pacific Ocean Salt in salt water comes from Salt in salt water comes from WEATHERED WEATHERED

rocks.rocks. Ocean water has many resources:Ocean water has many resources:

– Fish, ocean animals, plants used for foodFish, ocean animals, plants used for food– Oil comes from wells under the oceanOil comes from wells under the ocean

SALT WATERSALT WATER

WHERE FRESH WATER AND WHERE FRESH WATER AND SALT WATER MEETSALT WATER MEET

ESTUARYESTUARY: A PLACE WHERE : A PLACE WHERE FRESH WATER FROM A RIVER FRESH WATER FROM A RIVER MIXES WITH SALT WATER MIXES WITH SALT WATER FROM THE OCEANFROM THE OCEAN

                                                                                                                           

                           

THE WATER CYCLETHE WATER CYCLE Form water takes depends upon the amount of Form water takes depends upon the amount of HEATHEAT or thermal energy in it. or thermal energy in it.

Three form of water:Three form of water:

LIQUID – liquid waterLIQUID – liquid water

SOLID – ICESOLID – ICE

GAS – WATER VAPORGAS – WATER VAPOR

EVAPORATIONEVAPORATION

Changing of a liquid into a gasChanging of a liquid into a gas (water) (water vapor)(water) (water vapor)

HEATHEAT must be added to a liquid to make it evaporate. must be added to a liquid to make it evaporate.

EVAPORATION CHANGES EVAPORATION CHANGES LIQUID WATER INTO INVISIBLE LIQUID WATER INTO INVISIBLE GAS – WATER VAPOR.GAS – WATER VAPOR.

CONDESATIONCONDESATION

Condensation is the changing of a gas into a Condensation is the changing of a gas into a liquid.liquid.

Taking Taking HEATHEAT away from a gas or cooling it, away from a gas or cooling it, changes the gas into a liquid.changes the gas into a liquid.

PRECIPITATIONPRECIPITATION

Precipitation is any water that falls to Earth Precipitation is any water that falls to Earth as rain, snow, sleet or hail.as rain, snow, sleet or hail.

THE WATER CYCLETHE WATER CYCLE THE MOVEMENT OF WATER FROM EARTH’S THE MOVEMENT OF WATER FROM EARTH’S

SURFACE INTO THE AIR AND BACK TO THE SURFACE INTO THE AIR AND BACK TO THE SURFACE AGAIN.SURFACE AGAIN.

THIS CYCLE IS POWERED BY THIS CYCLE IS POWERED BY HEATHEAT FROM THE SUN.FROM THE SUN.