IGCSE/GCSE/O & A Level/IB/University Student Forum
Qualification => Subject Doubts => IGCSE/ GCSE => Social Studies => Topic started by: LM on September 09, 2009, 01:29:32 pm
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There are some questions in my geog hw that I can't answer....can anybody help me??
here's the questions...
1. name an area of the world where freeze-thaw weathering and onion weathering takes place
2. describe how the rock is being weathered in onion weathering and freeze-thaw weathering.
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igcse or as???
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Onion skin weathering is a Geological process that happens mainly in deserts. As the rock heats up and expands by day, and cools and contracts by night, stress is often exerted on the outer layers. The stress causes the peeling off of the outer layers of rocks in thin sheets. Though this is caused mainly by temperature changes, thermal expansion is enhanced by the presence of moisture.
Onion skin weathering has to do with rocks mostly in the desert. It is when the hot temperature of the day is then reduced to a cold temperature at night. This change in temperature causes layers of the rock to peel off like onion skin coming off. Therefore it is called onion skin weathering.
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I would suggest south america, southern chile or argentina/ There are deserts there I believe. Or mongolia.
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I would suggest south america, southern chile or argentina/ There are deserts there I believe. Or mongolia.
sir, u gr8 in geography too
u shud change ur username too astarmathsphysicsandgeography.
hahaha
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i guess he must just kee it overallastar!!!
u know y??
cause he knows all the subjects i guess!!