This boulder was split by gelifraction (water freezes and expands, working to wedge the rock open). This is a type of mechanical or physical weathering.
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15
What is eroding this land? a) Wind; b) Rain; c) Glaciers; d) Rivers.
b) Rain (Rain-splash erosion: rain splashing down on the land and dislodging weathered material such as pebbles or soil).
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trap
No points!
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gift
Win 25 points!
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gift
Win 15 points!
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baam
Lose 15 points!
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seesaw
Swap points!
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rocket
Go to first place!
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rocket
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lifesaver
Give 5 points!
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15
What caused these shapes?
Limestone was weathered by rainwater containing dissolved CO2 (this process is sometimes called carbonation and is a type of chemical weathering).
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15
What happened to this sculpture?
Trees have slowly weathered stone by vines and roots expanding in and around rocks.
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15
Was this valley eroded by a river ir by a glacier?
A U-shaped valley is an example of a glacial landform, carved by slowly moving glaciers.
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15
How are sand dunes formed?
Sand dunes form when wind-blow sand starts to pile up.
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15
Why are the hills protruding like that over the valley?
The hills are made of harder rocks than the softer rocks in the valley.
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10
What type of weathering is shown in the picture? a) Mechanical; b) Biological; c) Chemical; d) Magical
a) Mechanical (water soaks into small fissures and cracks, expands when it freezes in the winter, and physically breaks the rock apart)
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10
What type of plate boundaries are responsible for these folded rocks in the Pyrinees?
Convergent boundaries
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15
What is the typical shape of a river valley?
They are typically V-shaped valleys.
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10
True or false? Gravity causes water to flow from higher to lower ground.
True
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10
Water has the power to split rocks because when it freezes, it: a) contracts; b) evaporates; c) expands