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Water on EarthWater on Earth
The Water CycleThe Water Cycle
The Science of The Science of the Water Cyclethe Water Cycle
3 States of Water3 States of Water
Solid – iceSolid – ice
Gas – Water Vapor
Liquid -water
3 States of Water3 States of Water
Solid- molecules packed together Solid- molecules packed together and vibrating very slowlyand vibrating very slowly
Middleschoolchemistry.com
Ice animation
LiquidLiquid
Molecules loosely packed and Molecules loosely packed and sliding past each othersliding past each other
Middleschoolchemistry.com
Compare a solid and a liquid animation
Vapor (gas)Vapor (gas)
Molecules are spread far apart and Molecules are spread far apart and moving fast moving fast
Middleschoolchemistry.com
Comparing solid, liquid, gas animation
How does water change How does water change state?state?
By By addingadding or or removingremoving heat heat energyenergy
Add energyAdd energy (think (think EnEnergy ergy InIn))
Remove energyRemove energy (think Energy (think Energy ExExits)its)Heating and cooling of a solid animationHeating and cooling of a liquid melting ice animationHeating and cooling of a gas
Changing StatesChanging StatesIs energy added or Is energy added or
removed?removed?
Ice melting- energy is ________Ice melting- energy is ________ Water freezing- energy is _________Water freezing- energy is _________ Water boiling- energy is __________ Water boiling- energy is __________
Adding and removing energy
Where does this “energy” come Where does this “energy” come from to change the state the water from to change the state the water is in?is in?
This process is driven by the sun This process is driven by the sun and its energyand its energy
Water CycleWater Cycle
Water Cycle VideoWater Cycle Video
What is the Water Cycle?What is the Water Cycle?
The continuous movement of The continuous movement of water into the air, onto land, and water into the air, onto land, and back into the air over and over back into the air over and over again again
Water Cycle
Water Cycle- EvaporationWater Cycle- Evaporation
The sun heats up liquid water The sun heats up liquid water
and turns it into water vapor (gas)and turns it into water vapor (gas) Water vapor is invisibleWater vapor is invisible
The “smoke” we see is from the vapor condensing…
Evaporation animation
Water Cycle- TranspirationWater Cycle- Transpiration
Do plants sweat?Do plants sweat? Well, sort of.... people perspire (sweat) and Well, sort of.... people perspire (sweat) and
plants transpire. plants transpire. Transpiration is the process by which Transpiration is the process by which
plants lose water out of their leavesplants lose water out of their leaves. . Transpiration gives evaporation Transpiration gives evaporation
a bit of a hand in getting the water a bit of a hand in getting the water
vapor back up into the air.vapor back up into the air.
Water Cycle- Water Cycle- CondensationCondensation
Water vapor in the air gets cold Water vapor in the air gets cold and changes back into liquid, and changes back into liquid, forming clouds forming clouds
Condensation animation
Water Cycle- PrecipitationWater Cycle- Precipitation
The solid or liquid water thatThe solid or liquid water that
Falls from the air to the surfaceFalls from the air to the surface
-rain, snow, sleet, hail…-rain, snow, sleet, hail…
Water Cycle- RunoffWater Cycle- Runoff
Water that flows across land and Water that flows across land and collects in rivers, streams, and collects in rivers, streams, and eventually the oceaneventually the ocean
Water Cycle- GroundwaterWater Cycle- Groundwater
Water Water
located located
within the within the
rocks below rocks below
the Earth’s the Earth’s
surfacesurface
Changing states in the Changing states in the Water CycleWater Cycle
Evaporation- energy is_________Evaporation- energy is_________ Condensation- energy is __________Condensation- energy is __________ Transpiration- energy is ___________Transpiration- energy is ___________
Water Everywhere!Water Everywhere!Water is MATTERWater is MATTER. .
-What is matter?-What is matter?
It has Mass and Volume. It has Mass and Volume.
Conservation of MatterConservation of MatterWater cannot be created, nor Water cannot be created, nor
destroyed. It cycles. It changes statedestroyed. It cycles. It changes state (remember the 3 phases- solid, liquid, (remember the 3 phases- solid, liquid, gas) it never decreases or increases gas) it never decreases or increases in total amount.in total amount.
We do not have more or less water now We do not have more or less water now than we did millions of years ago!!than we did millions of years ago!!
The Water Cycle just keeps going, and The Water Cycle just keeps going, and going, and going, and going……going, and going, and going……
More examples of More examples of Conservation of MatterConservation of Matter
Rock cycleRock cycleWeathering/Erosion/Weathering/Erosion/
DepositionDepositionPlate tectonicsPlate tectonics