Share Weathering and Erosion Quiz
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What is weathering?
The breaking down of rocks where they are.
What is erosion?
The wearing away and moving of rocks by rivers, wind, ice
Name two types of weathering.
Mechanical (physical) and chemical.
What is freeze-thaw weathering?
Water gets into cracks freezes expands and breaks the rock
What is chemical weathering?
When rain (often slightly acidic) dissolves certain rocks like limestone.
What is biological weathering?
Plants or animals breaking down rocks eg. roots
Which rock is easily dissolved by rainwater?
Limestone.
What is abrasion in a river?
Stones and rocks carried by the river scrape the riverbed and banks.
What is attrition?
Stones in the river smash into each other and become smoother and smaller.
What is hydraulic action?
The force of water hitting against the banks and bed of the river.
Name two agents of erosion.
Rivers and the sea (also wind and ice).
How do glaciers cause erosion?
By plucking rocks and scraping the land.
What is the main difference between weathering and erosion?
Weathering breaks rocks down erosion moves them away.
What is solution in a river?
When minerals dissolve in the water and are carried away.
Why does freeze-thaw happen more in mountains?
Because it is cold and water can freeze easily.
What is onion-skin weathering?
Outer rock peels off.
