weathering, erosion and deposition. what is spelunking? cave exploring
TRANSCRIPT
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Weathering, Erosion and Deposition
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What is spelunking?
Cave exploring
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Lesson Vocabulary words
• Weathering• Physical weathering• Chemical weathering• Erosion• Deposition
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Physical Weathering Changes RocksAbrasion from wind and moving
sedimentGlaciers scratching rocksPlant roots and animals breaking rocksFreezing icePressure changes
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Chemical Weathering Changes Rocks
Plants releasing compounds into rock and soilLichens that release acidsOxidationAcid rainGroundwater
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Movement of sediment by wind, water, ice and gravity is called .EROSION
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3 causes of Erosion other than wind.
GravityMoving waterGlaciers
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How do wind and water change landscapes?
Wind and water can create sediments from rocks, erode, then deposit at a different location.
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Weathering and Erosion on a Coast
Both _______________ and ___________________ cause weathering, erosion and deposition along coastlines.
________________ ________________ can form as water erodes and abrades the land to create a deep hollow.
waves
currents
Sea Caves
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Deposition along a coastline
When an agent of erosion drops sediment or rock, ____________________ is taking place.
A __________________ is a triangular feature that forms when a river enters another body of water.
Large mounds of sediment dropped parallel to the shore are called _________________ islands.
Are all beaches sandy?
When waves and currents deposit sand perpendicular to the shore, a feature called a _________ forms.
deposition
delta
barrier
no
spit
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Features formed where river meets ocean
Moving ______________, in the form of _______________ and _______________, weathers, erodes, and deposits sediment to shape and reshape the many types of land features that form along a coastline.
water wavescurrents
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Deposition by water and wind
Like a delta, an __________________ fan is a triangular deposit, but it forms on land.
Although flooding can be dangerous to people living near a river, floods _______________ the soil on a floodplain.
__________________ __________________ happen quickly to change the land.
__________________ are depositional features that form when wind drops large volumes of sediment, such as sand and silt, in the same place.
Alluvial
enrich
Flash floods
Dunes
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Deposition by glaciers ______________________ are large masses of ice that move slowly
over Earth's surface.
Till is _____________________ of any size that's dropped by a glacier, it is unsorted and can be any size.
Glacial _________________ are ridges full of till.
Glaciers
sediment
moraines
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Alluvial fans
An ____________________ ____________ forms when a stream quickly goes from a steep slope to flatter land. Over time, the stream forms a triangular deposit here.
Alluvial fan
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Earth processes
_______________________ is any process that changes a rock's size or its composition.
When agents of change (wind, water, gravity, and ice) stop or slow down, they drop, or ________________, the sediment to form a variety of land features.
Weathering
deposit
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Review
The rocks that make up Earth's land features are continually __________________ by natural processes.
Water, ice, wind, gravity, and living organisms cause land features to constantly
_____________________________ is a natural process that can change and break down rock.
________________________ is the process by which the products of weathering are moved from place to place.
_______________________ is the process by which eroded materials are dropped.
reshaped
change
Weathering
Erosion
Deposition