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Byju's Answer
Standard VII
Chemistry
Factors Effecting a Chemical Change
Which of the ...
Question

Which of the following are natural changes?

A
Deforestation
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B
Air pollution
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C
Thunderstorms
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D
Floods
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Solution

The correct options are
C Thunderstorms
D Floods
The changes which take place naturally and do not involve any human interference are called natural changes. Thunderstorms and floods are natural changes.

Air pollution is a result of smoke created by burning of fuels and deforestation is cutting of trees. These are caused by humans. So these are man-made changes.

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