Social Science VD
54
EXERCISES
Q.1. Answer the following questions in brief :
(1) Write any two ways in which human beings modify their environment.
Ans. (a)........
(b)...........
(ü) Give various landforms found on lithosphere. Are those landforms found in hydrosphere too?
Ans.
(ii) From what does the atmosphere protect us?
Ans.
(iv) Name any four large ecosystems.
Ans. (a)............
(b) ........
(c)
(d) ......
Answers
Answer:
1) Land, air, and water pollution are all ways we edit the... Human beings modify the natural environment around them to benefit themselves, and rarely the animals. We modify the environment by building farms to grow food, terraforming land to allow construction, and tearing open the ground for ores.
2)1. Environment: The immediate natural surroundings of man is called environment. E.g.: Plants, Air, Water, Landforms, Wildlife, etc.......
The word Environment has been derived from a French word "Environner" which means "Neighborhood".
2. Components of Environment:
(a) Natural Environment (b) Human Environment (c) Human Made Environment
3) It acts as a huge blanket, keeping the Earth warmer than it would be without the atmosphere. ... The atmosphere also protects living things on Earth from the sun's harmful ultraviolet radiation. A thin layer of gas called ozone high up in the atmosphere filters out these dangerous rays.
4) The major types of ecosystems are forests, grasslands, deserts, tundra, freshwater and marine. The word “biome” may also be used to describe terrestrial ecosystems which extend across a large geographic area, such as tundra.