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Subjects
Science CBSE
Class 8
Coal and petroleum
Different types of natural resources
3.
Fossil fuels formation
Exercise condition:
3
m.
Fill in the blanks
:
1.
The dead sea organisms such as
and plants get covered with sand and clay to form petroleum.
2.
is the second stage in coal formation.
3.
Petroleum and natural gas are termed as
as many useful products are obtained from them.
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