CBSE Class 9 Science Natural Resources Quiz 1

1. The atmosphere of the Earth is heated by radiations which are mainly

A radiated by the Sun B re-radiated by land C re-radiated by water D re-radiated by land and water

2. If there were no atmosphere around the Earth, the temperature of the Earth will

A increase B go on decreasing C increase during day and decrease during night D be unaffected

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

A We will be protected more B It will become poisonous and kill living forms C Ozone is not stable, hence it will be toxic D It will help harmful Sun radiations to reach Earth and damage many life forms.

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

A the Sun B water C wind D polythene bags

5. The two forms of oxygen found in the atmosphere are

A water and ozone B water and oxygen C ozone and oxygen D water and carbon dioxide

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

A molecular form of hydrogen B elemental form of oxygen C water D elemental form of nitrogen

7. Rainfall patterns depend on

A the underground water table B the number of water bodies in an area C the density pattern of human population in an area D the prevailing season in an area

8. Among the given options, which one is not correct for the use of large amount of fertilisers and pesticides?

A They are eco-friendly B They turn the fields barren after some time C They adversely affect the useful component from the soil D They destroy the soil fertility

9. The nitrogen molecules present in air can be converted into nitrates and nitrites by

A a biological process of nitrogen fixing bacteria present in soil B a biological process of carbon fixing factor present in soil C any of the industries manufacturing nitrogenous compounds D the plants used as cereal crops in field

10. One of the following processes is not a step involved in the water-cycle operating in nature

A evaporation B transpiration C precipitation D photosynthesis