water on the earth notes
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Water on the Earth Notes. Earth Science Grade 8. The Earth is the only planet in the solar system to be covered in water . Water covers about 75% of the Earth’s surface. Any place on the Earth that contains water is called the hydrosphere. - PowerPoint PPT PresentationTRANSCRIPT
Water on the Water on the Earth NotesEarth Notes
Earth Science Earth Science
Grade 8Grade 8
The Earth is the only planet in the The Earth is the only planet in the solar system to be covered in solar system to be covered in waterwater..
Water covers about Water covers about 75%75% of the of the Earth’s surface.Earth’s surface.
Any place on the Earth that contains Any place on the Earth that contains water is called the water is called the hydrospherehydrosphere..
Of the water on the Earth, Of the water on the Earth, 97%97% is is salt water and salt water and 3%3% is fresh. is fresh.
Almost 67% of all the fresh water is Almost 67% of all the fresh water is locked up in locked up in glaciersglaciers near the North near the North and South Poles.and South Poles.
That leaves just That leaves just 1%1% of all the water of all the water on the planet available for plants on the planet available for plants and animals to live on. and animals to live on.
Water PercentagesWater Percentages
Fresh water
salt water
97%97%
3%
Fresh w ater inglaciers
fresh w ater availableto use
67% 67% locked locked in in glacierglacierss
33% available to use
33% of 3% = only 1% for all plants and animals to use
Water constantly moves through the Water constantly moves through the atmosphere by the atmosphere by the water cyclewater cycle. .
Water that does not soak into the Water that does not soak into the ground or evaporate into the ground or evaporate into the atmosphere is called atmosphere is called runoffrunoff..
RUNOFF=RIVERS RUNOFF=RIVERS
Water Cycle AnimationWater Cycle Animation
http://epa.gov/climatechange/kids/http://epa.gov/climatechange/kids/water_cycle_version2.htmlwater_cycle_version2.html
Four factors affecting Four factors affecting absorption of rainabsorption of rain
Amount of rainfallAmount of rainfall
Heavy downpour =A lot of runoff
Light, misty rain=Little run off
Four factors affecting Four factors affecting absorption of rainabsorption of rain
Time span of the rainTime span of the rain 2 inches of rain in 1 hour = a lot of 2 inches of rain in 1 hour = a lot of
runoffrunoff 2 inches of rain in 1 week = little runoff2 inches of rain in 1 week = little runoff
Velocity of the RiversVelocity of the RiversFastest at 1) very center of the riverFastest at 1) very center of the river
2)outside of the meander2)outside of the meander
1
2
Erosion/Deposition of a Erosion/Deposition of a RiverRiver
Erosion occurs on the outside of the river Erosion occurs on the outside of the river meandermeander
Deposition occurs on the inside of the Deposition occurs on the inside of the river meanderriver meander
Bed load and Suspended Bed load and Suspended loadload
Bed load: material that rolls along Bed load: material that rolls along the bottom of the riverthe bottom of the river
Suspended load: material that floats Suspended load: material that floats suspended in the watersuspended in the water
Development of an Development of an Oxbow lakeOxbow lake
1.
2.
3.
4.
Oxbow lake: cutoff meander