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1) C
2) B
3) D
4) A
5) F
6) E
Answer
Physical weathering weathering is is breaking breaking up up rocks rocks by by force, force, while while chemical weathering weathering involves involves chemical chemical processes.
Explanation:
- Physical weathering refers to the mechanical weathering that takes place due to the freezing and thawing go the rocks which are exposed to hot and cold temperatures of the day and night
- An example of physical weathering is the onion peel weathering of rocks.
- While chemical weathering is the weathering by addition of oxygen, water and carbon to rock minerals.
Answer:
C. Because of a warm water ocean flow
Explanation:
D. single- and simple multi-celled organisms
Although more complex animals like invertebrates and multi-celled organisms began to appear, it was very late compared to the original, simpler organisms for which the Precambrian time is characterized by.
Answer:
Yes
Explanation:
The General Mining Act of 1872 , needs to be reformed because there is a clause in it that there will be no protection of environment. This cannot be justified seeing the present day scenario as environment has come under huge stress due to anthropogenic activities including mining. Sustainable development is more important than increasing economy. Environment protection will also help in economy boost in a long run by reducing the costs of rejuvenating the damaged ecosystem in future.
