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15
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Why are V-shaped valleys narrow and steep?
River cuts downwards.
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eraser
Reset score!
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fairy
Take points!
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25
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gift
Win 15 points!
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lifesaver
Give 25 points!
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15
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Name one feature in the youthful stage of a river.
V-shaped valley.
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15
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What is erosion?
The wearing away and moving of rocks by rivers, wind, ice
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15
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What shape valley does a young river make?
V-shaped.
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25
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What is biological weathering?
Plants or animals breaking down rocks eg. roots
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25
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How do glaciers cause erosion?
By plucking rocks and scraping the land.
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10
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Which rock is easily dissolved by rainwater?
Limestone.
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15
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What is freeze-thaw weathering?
Water gets into cracks freezes expands and breaks the rock
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15
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How do V-shaped valleys form?
River erodes down sides collapse.
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15
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Where does onion-skin weathering usually happen?
Hot deserts.
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What is onion-skin weathering?
Outer rock peels off.
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boom
Lose 50 points!
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fairy
Take points!
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shark
Other team loses 20 points!
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banana
Go to last place!
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20
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What is hydraulic action?
The force of water hitting against the banks and bed of the river.
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15
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What is the main difference between weathering and erosion?
Weathering breaks rocks down erosion moves them away.
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boom
Lose 50 points!
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magnet
Take 10 points!
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fairy
Take points!
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25
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thief
Give points!
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