NCERT Class-9 Science Solutions: Chapter 14-Natural Resources Part 1

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Multiple Choice Questions

Question 1:

The atmosphere of the earth is heated by radiations which are mainly

  1. Radiated by the sun

  2. Re-radiated by land

  3. Re-radiated by water

  4. Re-radiated by land and water

Answer: D

Image Re-radiated land and water

Image Re-Radiated Land and Water

Image Re-radiated land and water

Question 2:

If there were no atmosphere around the earth, the temperature of the earth will

  1. Increase

  2. Go on decreasing

  3. Increase during day and decrease during night

  4. Be unaffected

Answer: C

Earth temperature day and decrease during night

Earth Temperature Day and Decrease During Night

Earth temperature day and decrease during night

Question 3:

What would happen, if all the oxygen present in the environment is converted to ozone?

  1. We will be protected more

  2. It will become poisonous and kill living forms

  3. Ozone is not stable, hence it will be toxic

  4. It will help harmful sun radiations to reach earth and damage many life forms.

Answer: B

Question 4:

One of the following factors does not lead to soil formation in nature

  1. The sun

  2. Water

  3. Wind

  4. Polythene bags

Answer: D

Image nature due to Polythene bags

Image Nature Due to Polythene Bags

Image nature due to Polythene bags

Question 5:

The two forms of oxygen found in the atmosphere are

  1. Water and ozone

  2. Water and oxygen

  3. Ozone and oxygen

  4. Water and carbon-dioxide

Answer: C

Image the Ozone and oxygen

Image the Ozone and Oxygen

Image the Ozone and oxygen

Question 6:

The process of nitrogen-fixation by bacteria does not take place in the presence of

  1. Molecular form of hydrogen

  2. Elemental form of oxygen

  3. Water

  4. Elemental form of nitrogen

Answer: B

Image the Elemental form of oxygen

Image the Elemental Form of Oxygen

Image the Elemental form of oxygen

Question 7:

Rainfall patterns depend on

  1. The underground water table

  2. The number of water bodies in an area

  3. The density pattern of human population in an area

  4. The prevailing season in an area

Answer: B

Image water bodies in an area

Image Water Bodies in an Area

Image water bodies in an area