Hydrologic cycle Book Back Questions 8th Social Science Lesson 11
8th Social Science Lesson 11
11] Hydrologic cycle
Book Back Questions with Answer and Do You Know Box Content
Do You Know?
The rate of evaporation increases with: Increase in wind speed. Increase in temperature. Decrease in humidity and increase in areal extent of surface water bodies.
Condensation occurs when the air gets saturated. Warm air can hold more water vapour than the cool air. Saturation occurs when the temperature drops down.
Units of the Measurement pertaining to Hydrology: Evaporation/interception-inches (or) cm. Infiltration –inches (or) cm/hour. Precipitation-inches (or) mm (or) cm. Run off – inches (or) mm (or) cm. Run off rate – cubic feet per second. Run off volume – acre feet (or) cubic feet. Storage – cubic feet (or) acre feet.
Choose the best answers:
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) Ground water
(b) Surface Water
(c) Potable water
(d) Artesian water
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 <0.5 mm in diameter is known as ___________
5. Mist is denser than _______________
Match the following:
1. Vegetation – Clouds
2. Condensation – Sleet
3. Snow and rain drops – At the surface
4. Infiltration – Transpiration
Consider the following the statements and tick the appropriate answer:
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
State true or false. If false, correct the statement:
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:
Choose the best answers:
1. Hydrologic Cycle 2. 2.8 3. Condensation 4. Runoff 5. Transpiration 6. Potable water
Fill in the blanks:
1. Humidity 2. Three 3. Precipitation 4. Drizzle 5. Fog
Match the following:
1.Vegetation- Transpiration
2.Condensation- Clouds
3.Snow and rain drops- Sleet
4.Infiltration- At the surface
Choose the correct statement
1. II and III are correct
State true or false. If false, correct the statement:
1.True
2.False
Correct answer: Mist is the tiny droplets of water hanging in the air
3.True