CBSE Class 9 Science, Natural Resources: Chapter notes (Part-I)

Here, you will get the CBSE Class 9 Science, Natural Resources: Chapter notes (Part-I). These chapter notes are prepared by the subject experts and cover every important topic from the chapter. You will get a crisp and brief explanation of all these topics so as to make your learning easy and organized. At the end of the notes you can try the questions asked from the discussed set of topics. These questions will help you to track your preparation level and get a hold on the subject.

CBSE Class 9 Science, Natural Resources: Chapter notes (Part-II)

Main topics covered in this part of CBSE Class 9 Science, Natural Resources: Chapter Notes, are:

Also Read: CBSE Class 9 Complete Study Material for 2020-2021

Keynotes for Chapter - Natural Resources, are:

Introduction:

CBSE Class 9 Science Syllabus (Latest)

Earth is divided into four spheres that interact to help life sustain on this planet:

1. Lithosphere

2. Hydrosphere

3. Atmosphere

4. Biosphere

Biosphere is further divided into two components:

(i) Biotic components: The living things constitute the biotic components of the Biosphere.

(ii) Abiotic components: The non-living things air, water and soil form the abiotic components of the Biosphere.

The Breath of Life: Air

Carbon Dioxide Gas:

It constitutes 0.04% of the air. It helps maintain temperature on earth by acting as greenhouse gas.

Production of Carbon dioxide

It is produced in the atmosphere by following activities:

Carbon Dioxide Fixation

The Movement of Air: Winds

Role of Atmosphere in Climate Control         

Try the following questions:

Q1.  Name two natural resources available on the earth.

Q2. Define biosphere. Name its components. 

Q3. Name the three processes in which oxygen is used.

Q4. Why is the atmosphere referred as a protective blanket?

Q5. Write the three ways by which CO2 is returned back into atmosphere?

Q6. What causes winds?

Also Read: CBSE Class 9 Science Chapter Notes - All Chapters

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