NCERT Class 9 Social Science MCQ Chapter 3 Atmosphere and Climate Solutions English Medium As Per New Syllabus. NCERT Class 9 Social Science MCQ Chapter 3 Atmosphere and Climate Notes to each chapter is provided in the list so that you can easily browse throughout different chapter NCERT Class 9 Social Science MCQ Question Answer Download PDF and select needs one. CBSE Class 9 Social Science Multiple Choice Solutions.
NCERT Class 9 Social Science MCQ Chapter 3 Atmosphere and Climate
Also, you can read the CBSE book online in these sections Solutions by Expert Teachers as per (CBSE) Book guidelines. NCERT Class 9 Social Science Objective Type Solutions. These solutions are part of NCERT All Subject Solutions. Here we have given NCERT Class 9 Social Science MCQs in English Medium Solutions for All Subject, You can practice these here.
Atmosphere and Climate
Chapter – 3
| Part – I: Geography |
| MCQ |
1. What holds the Earth’s atmosphere around the planet?
(i) Magnetism.
(ii) Gravity.
(iii) Rotation.
(iv) Air pressure.
Ans: (ii) Gravity.
2. Which gas forms the largest portion of the Earth’s atmosphere?
(i) Oxygen.
(ii) Carbon dioxide.
(iii) Nitrogen.
(iv) Argon.
Ans: (iii) Nitrogen.
3. Approximately what percentage of the atmosphere is made up of oxygen?
(i) 10%.
(ii) 21%.
(iii) 50%.
(iv) 78%.
Ans: (ii) 21%.
4. Water vapour in the atmosphere mainly helps in:
(i) Earthquakes.
(ii) Cloud formation and precipitation.
(iii) Plate movement.
(iv) Volcano formation.
Ans: (ii) Cloud formation and precipitation.
5. Which layer of the atmosphere is closest to the Earth’s surface?
(i) Stratosphere.
(ii) Mesosphere.
(iii) Troposphere.
(iv) Thermosphere.
Ans: (iii) Troposphere.
6. Nearly all weather phenomena occur in the:
(i) Exosphere.
(ii) Thermosphere.
(iii) Troposphere.
(iv) Mesosphere.
Ans: (iii) Troposphere.
7. The boundary between the troposphere and the stratosphere is called the:
(i) Stratopause.
(ii) Mesopause.
(iii) Tropopause.
(iv) Exobase.
Ans: (iii) Tropopause.
8. Which layer contains the ozone layer?
(i) Troposphere.
(ii) Stratosphere.
(iii) Mesosphere.
(iv) Exosphere.
Ans: (ii) Stratosphere.
9. The ozone layer protects the Earth by absorbing:
(i) Radio waves.
(ii) Harmful ultraviolet radiation.
(iii) Infrared rays only.
(iv) Sound waves.
Ans: (ii) Harmful ultraviolet radiation.
10. Most meteorites burn up in the:
(i) Troposphere.
(ii) Stratosphere.
(iii) Mesosphere.
(iv) Exosphere.
Ans: (iii) Mesosphere.
11. Auroras mainly occur in the:
(i) Troposphere.
(ii) Mesosphere.
(iii) Thermosphere.
(iv) Exosphere.
Ans: (iii) Thermosphere.
12. The uppermost layer of the atmosphere is the:
(i) Mesosphere.
(ii) Thermosphere.
(iii) Exosphere.
(iv) Stratosphere.
Ans: (iii) Exosphere.
13. Weather refers to:
(i) Average atmospheric conditions over thirty years.
(ii) Day-to-day atmospheric conditions.
(iii) Earth’s rotation.
(iv) Seasonal wind reversal.
Ans: (ii) Day-to-day atmospheric conditions.
14. Climate refers to the average weather conditions over:
(i) One week.
(ii) One month.
(iii) Thirty years or more.
(iv) One season only.
Ans: (iii) Thirty years or more.
15. Which of the following is an element of weather and climate?
(i) Temperature.
(ii) Humidity.
(iii) Wind.
(iv) All of the above.
Ans: (iv) All of the above.
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