Soil Erosion and Desertification

Q.

What would happen if there would be no trees?

Q.

Which one of the following is suitable for restoring soil fertility?

1. Terrace Farming

2. Rotation Of Crops

3. Contour Ploughing

4. Shifting Agriculture Along The Hill Slopes

Q.

An increase in carbon dioxide content in the atmosphere would not cause:

1. more heat to be retained by the environment

2. increase in photosynthesis in plants

3. global warming

4. abundance of desert plants

Q. Jhum cultivation is an agricultural practice which does not contribute to deforestation.

1. True
2. False

Q.

The soils which are carried and deposited by river and wind are called _______

Q.

Ground water will not be depleted due to

1. Afforestation

2. Thermal power plants.

3. Loss of forest, and decreased rainfall.

4. Cropping of high water demanding crops.

Q. Decrease in species diversity in tropical countries is due to

1. Afforestation
2. Pollution
3. Deforestation
4. Soil Erosion

Q.

Increased concentration of nitrogen in the air is believed to cause global warming. (True or False). Also, write the false statements in their correct form.

1. True
2. False

Q.

The process of bringing wild species of plants under cultivation to suit human needs is called

1. Domestication

2. Cultivation

3. Hybridisation

4. Selection

Q. Assertion: Deforestation leads to global warming

Reason: Trees hold a lot of carbon in their biomass

1. Both assertion and reason are true and the reason is the correct explanation of assertion
2. Both assertion and reason are true but the reason is not the correct explanation of assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false

Q.

Increased concentration of nitrogen in the air is believed to cause global warming. (True or False). Also, write the false statements in their correct form.

1. True
2. False

Q. Read the following statements (A - E) and identify how many of the following help in controlling global warming.

A. Cutting down the use of fossil fuels.
B. Improving the efficiency of energy usage.
C. Reducing afforestation.
D. Planting trees.
E. Increasing the emission of greenhouse gases.

1. 2
2. 5
3. 4
4. 3

Q. Assertion :Deforestation causes global warming. Reason: Deforestation increases level of green house gas ${CO}_2$ in atmosphere

1. X is correct, Y is wrong
2. X and Y both correct but Y is not correct explanation
3. X and Y both correct with Y being correct explanation
4. X and Y both are wrong.

Q.

How do we affect the ecosystem?

Q. How does deforestation affect the biodiversity of the forest ecosystem

Q. Short note : Soil erosion

Q. Which is the main causative factor of desertification

1. Developmental activities
2. Tourism
3. Overgrazing
4. Irrigated agriculture

Q. Which one is not a natural factor for causing soil erosion?

1. Gullying
2. Clips
3. Rilling
4. Deforestation

Q. Jhum cultivation is an agricultural practice which does not contribute to deforestation.

1. True
2. False

Q. ............ is a man-made source of air pollution.

1. Desert
2. Farming
3. Volcanic eruptions
4. Dust storms

Q.

In hilly areas erosion is minimized by which kind of farming?

Q. Deforestation generally decreases

1. Global warming
2. Drought
3. Soil erosion
4. Rainfall

Q. Which one of the following erosion processes is a natural process?

1. Geological erosion
2. Accelerated erosion
3. Gully erosion
4. Rill erosion

Q. What prevents soil erosion?

1. Allowing herbivorous animals to graze excessively
2. Growing plants to form the soil cover
3. Increasing fertility
4. Making the land sloppy

Q. The removal of land surface by water, wind or ice is known as

1. Seepage
2. Sewage
3. Erosion
4. None of the above

Q. Soil erosion can be reduced by

1. Deforestation
2. Grazing cattle
3. Contour ploughing
4. Using renewable resources
5. Increasing biodiversity

Q. To prevent soil erosion, farmer plants a hedge across a field. This method works because

1. The hedge prevents the soil from direct impact of rainwater
2. The roots of plants prevent the soil erosion
3. The hedge absorbs minerals from the soil, which makes it most compact
4. None of the above

Q. Maximum damage to forest cover is caused by

1. Edaphic factors
2. Climatic factors
3. Biotic factors
4. Physiographic factors

Q. Write an essay on soil erosion,

Q. Uniform soil erosion by running water is

1. Gully erosion
2. Rill erosion
3. Riparian erosion
4. Sheet erosion