3 The Water Cycle Essential Question: How does water change state and move around on Earth?Purpose:1. Describe the water cycle.2. Describe the different processes of the watercycle that occur on Earth.
4 VOCABULARY Word Definition In your own words Picture Water cycle EvaporationTranspirationSublimationCondensationPrecipitation
5 What is the Water Cycle?Movement of water between the atmosphere, land, oceans, and living things makes up the water cycle.
6 Water FlowGravity:Responsible for the precipitation falling from atmosphere.Water flows downward in rivers, streams and waterfallsIf land is flat form ponds, lakes and marshlands; will collect underground by seeping through soil called groundwater.Upward movement as water vapor and carried by wind; wind is also responsible for ocean currents.Visualize pg. 16 of book
7 State Change (not from New Jersey to New York) LiquidSolidGas
8 How does water change state? Changes state as energy is released or absorbedAs water absorbs energy from its surroundings, melting, change from solid to liquid.Water absorbs energy as it evaporates, changes from liquid to gas.Water absorbs energy from it surroundings, sublimation, from solid to gas.
9 How does water change state? Water releases energy into its surroundings as it condenses, from gas to liquid.Water release energy as it freezes, from a liquid to a solid.Water releases energy as it deposits, from a gas to a solidNO WATER IS LOST DURING PHASE CHANGESDo page 17 “Visualize It!”
10 How does water reach the atmosphere? Water reaches the atmosphere in one of 3 ways:EvaporationTranspirationSublimationIT TAKES A LOT OF ENERGY FOR A LIQUID OR SOLID TO TURN INTO WATER VAPORWhere does the energy come from to change a liquid or a solid to a gas?The Sun
11 How does water reach the atmosphere? Evaporation: occurs when liquid water changes to water vapor90% of water vapor in atmosphere comes from evaporationSome comes from the land but most comes from oceansOceans receive most of solar energy from sunTranspiration: release of water vapor into the air by plantsLiquid water turns to water vapor inside the plantWater vapor is released through tiny holes in the plant called the stomata
12 How does water reach the atmosphere? Sublimation: solid water changes directly to water vapor without becoming a liquid firstOccurs when wind blows over ice or snowLow pressureVery coldSmall amount of water in the atmosphere comes from sublimation#9 page 18
14 What happens to water in the atmosphere? Water reaches the atmosphere as water vaporTo leave must change to liquid or solidWHY?Liquid or solid can fall to Earth’s surface
15 What happens to water in the atmosphere? Condensation: change in state of water from gas to liquidOccurs when water is cooled enoughLatches on small particles to little balls or droplets of waterDroplets float in air as clouds, fog or mistOn ground will condense as dew.
16 What happens to water in the atmosphere? Precipitation: any form of water that falls to Earth from the cloudsDroplets “stick” together to become larger and fall to surface4 common types: rain, sleet, snow, hailMost falls in oceans—why?Where most of water evaporates fromHow does precipitation fall on land?Winds carry clouds from ocean over landPg and 11
17 How does water move on land and in the oceans? After water falls to the surface, it flows and circulates all over the EarthWater flows downhill on the surface and underground on landMost precipitation falls into the ocean; currents move ocean water
18 Runoff and Infiltration What causes water on land to flow downhill?GravityStreams, rivers and the water that flows over land are types of runoffFlows downhill toward oceans, lakes, and marshlandsWater on land that seeps into the ground is called infiltrationFlows downhill through soil and rockPg.20 #12
19 Ice FlowMost ice located in Greenland and Antarctica—some stored in glaciers all over EarthGlaciers:cover approximately 10% of EarthCalled “Rivers of Ice”Gravity causes glaciers to flow downhillMay never leave landMay flow to the ocean and break apart to form icebergs
20 Ocean CirculationWinds move ocean water on the surface in currents over long distances.If water is cold or salty, water will sink deep into the ocean to help create currentsSurface currents and deep ocean currents transports large amounts of water from ocean to oceanPg. 20 #13
21 What does water cycle transport? Water cycle transports:energyHow? (Turn and Talk)matterHow? (Turn and Talk)Energy is transported through change of state and by water movement.Matter is transported around world by:Ocean currentsRiversGlaciersPg. 21 #15