Page 119 - SST Class 07

A. Tick (3) the correct option.

1. Which planet can support life?
(a) Mars (b) Earth (c) Jupiter

2. The environment includes the things we can:
(a) see (b) touch (c) both (a) & b)
3. How many types of environments interact with one another?
(a) One (b) Two (c) Three

4. Which is the component of the earth that is composed of all liquid water found on the
planet?
(a) Hydrosphere (b) Lithosphere (c) Atmosphere
5. Humans use at least ______________ species of plants and animals on a daily basis.

(a) 40,000 (b) 40,0000 (c) 40,00000

B. Fill in the blanks.
1. We experience changes in the _________________ conditions in different seasons.

2. _________________ contains deposits of sedimentary rocks once laid down in a shallow
sea in that region.
3. Human environment has also undergone changes in ________________ and
________________ .
4. The motion of the hydrosphere and the exchange of water between the hydrosphere
and cryosphere is the basis of the _________________ .
5. The bottom 30 kilometers (19 miles) of the atmosphere contains about _______________
of its mass.
6. Scientists estimate that more than _________________ different species inhabit on the
earth.
7. _________________ became easier and speedy across the world.

C. Write True or False.
1. Jupiter is the home of all living beings.

2. There are many types of environments including those where nature is obvious
and dominant and those where human beings are dominant.
3. The physical and biological elements in the environment are dynamic in nature.
4. Buddhism, Jainism and Islam are relatively new when compared to Hinduism.

5. Human learnt new ways to change their environment according to their needs.
6. We should use our resources wisely and learn to conserve them.

Social Science-7 119