Hydrologic Cycle

Samacheer Book Back Questions And Answers For Geography Standard 8 Full Book “Hydrologic Cycle”

I Choose the Correct answer:
1. The process in which the water moves between the oceans, atmosphere and land is called
a) River Cycle
b) Hydrologic Cycle
c) Rock Cycle
d) Life Cycle

2. The percentage of fresh water on the earth is
a) 71
b) 97
c) 2.8
d) 0.6

3. The process of changing of water from gaseous to liquid form is known as
a) Condensation
b) Evaporation
c) Sublimation
d) Rainfall

4. Water that flows in the sub-soil or through the ground into the streams, rivers, lakes and oceans is termed as
a) Condensation
b) Evaporation
c) Transpiration
d) Runoff

5. The evaporation of water from the leaves of plants is called
a) Transpiration
b) Condensation
c) Water vapour
d) Precipitation

6. Water that is good enough to drink is called
a) Groundwater
b) Surface water
c) Potable water
d) Artesian water

II Fill in the blanks:
1. The degree of water vapour present in the atmosphere is known as _____.
2. There are _____ phases in the water cycle.
3. The falling of water towards the earth surface from atmosphere in any form is known as _____.
4. The precipitation with the rain drop size of<0.5mm in diameter is known as _____.
5. Mist is denser than _____.

Answers:
1. Humidity
2. Three
3. Precipitation
4. Drizzle
5. Fog

III Match the following:
1. Vegetation                      A. Clouds
2. Condensation                 B. Sleet
3. Snow and rain drops      C. At the surface
4. Infiltration                       D. Transpiration

Answers:
1. D
2. A
3. B
4. C

IV Choose the correct statement:
1. Evaporation refers to
I. The process in which the gaseous form of water changes in to liquid form.
II. It refers to the process in which the liquid form of water changes into gaseous form.
III. Water boils at 100oC temperature but, it actually begins to evaporate at 0oC.
IV. It is responsible for the formation of clouds.
a) I and IV are correct
b) II only correct
c) II and III are correct
d) All are correct

V State whether the following statements are True or False:
1. Water boils at 212oF temperature but, it begins to evaporate at 32oF.
2. Mist is not the tiny droplets of water hanging in the air.
3. The sub-surface runoff is usually referred as interflow.
Answers:
1. True
2. False (Tiny droplets)
3. True