Natural Resources | Class-9 NCERT (CBSE), Science (Biology) | Multiple Choice Questions (MCQ)

Class 9 Science - CBSE Guide NCERT Solutions

NATURAL RESOURCES

Multiple Choice Questions (MCQs) with answers

Question.1: Which of the following contribute to green house effect ?

   (a)      Methane

   (b)      Carbon dioxide

    (c)      CFCs

   (d)      All of these.

Question.2: Who is popularly known as ‘water man’ ?

   (a)        Gajendra Singh

   (b)        Rajendra Singh

   (c)        Louis Pasteur

   (d)        Tej Singh

Question.3: Major component of the atmosphere on Mars and Venus is

   (a)        Carbon dioxide

   (b)        Oxygen

   (c)        Nitrogen

   (d)        Water vapour

Question.4: Which gas which plays major role in global warming -

 (a)        Carbon monoxide

 (b)        Nitrous oxide

  (c)        Carbon dioxide

 (d)        Sulphur dioxide

Question.5: Green house effect is caused by

    (a)        Green plants

    (b)        Infrared rays

    (c)        UV rays

    (d)        X-rays

Question.6: Which are sensitive to sulphur dioxide pollution ?

   (a)        Mosses

   (b)        Lichen

   (c)        Algae

   (d)        Ferns

Question.7: In a forest ecosystem green plants are

   (a)        Primary producers

   (b)        Primary consumers

   (c)        Consumers

   (d)        Decomposers

Question.8: All the components (elements) of life support system are

   (a)        Interrelated

   (b)        Interdependent

   (c)        Interconnected

   (d)        All the above.

Question.9: Biotic components of an ecosystem consists of

   (a)        Producers

   (b)        Consumers

   (c)        Decomposers

   (d)        All the above

Question.10: In nitrogen cycle which bacteria are responsible for nitrification ?

   (a)        Nitrosomonas and Nitrobacter

   (b)        Clostridium

   (c)        Rhizobium

   (d)        Nitrosomonas

Question.11: The ozone layer blocks the

 (a)        Infrared radiations

 (b)        Sunlight

  (c)        UV rays

 (d)        None of these.

Question.12: Which is the major source of formation of soil ?

   (a)        River beds

   (b)        Glaciers

   (c)        Rocks

   (d)        Volcanoes

Question.13: The conversion of NO₃ to N₂ is known as

 (a)        Denitrification

 (b)        Nitrification

  (c)        Nitrogen fixation

 (d)        Ammonification

Question.14: Soil erosion can be prevented by

 (a)        Terrace farming

 (b)        Intensive cropping

  (c)        Afforestation

 (d)        All of these.

Question.15: In a natural ecosystem, decomposers include

    (a)        Microscopic organisms

    (b)        Algae

    (c)        Bacteria and fungi

    (d)        All plants.

Answer: 1-d. 2-b. 3-b. 4-c. 5-b. 6-b. 7-a. 8-d. 9-d. 10-a. 11-c. 12-c. 13-a. 14-d. 15-c.

Further study must on this chapter

• Class 9 Science | Natural Resources | Chapter - 14, NCERT (CBSE) Textbook Exercise Solution 
• Class IX, Natural Resources | Chapter-14, NCERT (CBSE), Science | Sample Questions 
• Class 9 NCERT (CBSE) Science | Chapter - 14, Natural Resources | In Text Questions - Answers