Geography Class 7th MCQs=340

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• Weathering: The disintegration (ٹوٹ پھوٹ) of rocks, which lie exposed to the weather, is called weathering.
  Rainfall, snowfall on rocks, chemical action and climate changes are the the main causes of weathering.
• There are two types of weathering.
  
• Rainfall, snowfall on rocks, chemical action and climate changes are the the main causes of weathering.
• There are two types of weathering.
• 1) Physical weathering: The soil and rocks are directly are indirectly affected by atmospheric conditions and are disintegrated in to small fragment. Snow fall, water, hot and cool weather pressure etc.
• 2) Chemical weathering: In this type of weathering the rock will be disintegrated due to different chemical action of the acid.
• Erosion can take place due to the following four agents
• 1) Running water  2) Wind  3) Glaciers   4) Waves 
• In Northern area of Pakistan Baltora glacier is 36 mile (57km) long.
• According to an estimate, 40% land has been become barren due to erosion.

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MCQs                                                                       .

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Which of the following is/are the cause/s of weathering?
a) snowfall on rocks   

b) rainfall
c) chemical action       

d) all of these

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How many types of weathering?
a) 2     

b) 3                 

c) 4     

d) 5

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