3.
A narrov
A. Tick (✓) the correct option.
4. They ar
5.
Rocks
1.
Which one is not a part of biological environment?
D. Answert
(a) plants
(b) water
(d) human beings
1.
Nan
(c) animals
2.
WH
2.
Volcanoes erupt due to-
3.
M
(a) internal disturbance of the earth.
(b) external disturbance of the earth.
(d) man-made changes on the earth.
4.
G
(c) climate change.
5.
3.
Which one brings a sudden change in the environment?
E. An
(b) rainfall
(a) formation of a river
1.
(d) formation of a mountain
(c) growth of a plant
2.
4. Identify by the term that stands for the topmost layer of the earth comprising of loose material-
(b) soil
(a) minerals
(d) sima
(c) sial
5.
In which year was the Wildlife Protection Act passed in India?
(b) 1972
(a) 1971
(d) 1974
(c) 1973
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Answer:
3. water.
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Answer:
i)The biological environment includes all the natural biological factors that depend upon the natural resources. Eg. Human beings, animals, birds. Thus water is considered as not a part of the biological environment.
ii)Volcanoes erupt when molten rock called magma rises to the surface. Magma is formed when the earth's mantle melts.If magma is thick, gas bubbles cannot easily escape and pressure builds up as the magma rises. When the pressure is too much an explosive eruption can happen, which can be dangerous and destructive.
iii)All these phenomenon being time consuming and taking place over a prolonged period of time, we are left with rainfall, which indeed causes a sudden change in the environment.
iv)The term that stand for the topmost layer of the earth comprising of loose material is option c - sial. Sima is next lawer layer of the earth that comes after sial and is also reffered as nife.
v)1972
Explanation:
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