SEBA Class 9 Social Science Important Chapter 7 Atmosphere: Structure, Air Pressure And Wind System Solutions English Medium As Per SEBA New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters SEBA Class 9 Social Science Additional Solutions and select need one. NCERT Important Solutions For Class 9 Social Science Download PDF. Important Notes for Class 9 Social Science.
SEBA Class 9 Social Science Important Chapter 7 Atmosphere: Structure, Air Pressure And Wind System
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. Assam SEBA Board Class 9 Social Science Additional Question Answer are part of All Subject Solutions. Here we have given CBSE Class 9 Social Science Important Notes for All Chapters, You can practice these here.
Atmosphere: Structure, Air Pressure And Wind System
Chapter: 7
| Part – II: Geography |
| IMPORTANT QUESTION ANSWER |
1. Name two gases present in the atmosphere at the extreme outer levels.
Ans. Helium, hydrogen.
2. Name a chemically inactive gas present in the atmosphere.
Ans. Argon.
3. Name the two types of air pressure observed in different parts of the world.
Ans. High pressure and low pressure.
4. Name the instrument to determine the correct direction of wind.
Ans. Wind vane.
5. In which seasons is tropical cyclone formed?
Ans. Summer season.
6. What is the upper limit of the troposphere known as?
Ans. Tropopause.
7. What is the average decrease of temperature per kilometre in the troposphere? What is this rate called?
Ans. 6.5°C Lapse rate.
8. Which layer forms the lower limit of heterosphere?
Ans. Mesopause of mesosphere.
9. Who discovered coriolis force and when?
Ans. French mathematician Gaspard de Coriolis in 1844.
10. Which British scientist developed a 0-12 scale of wind velocity?
Ans. Sir Francis Beaufort.
11. What are tropical cyclones called in the north-western coast of Australia?
Ans. Willy-Willy.
12. What is the upper limit of troposphere known as?
Ans. Tropopause.
13. Which type of wind creates dust storm?
Ans. Loo.
14. Which is the hottest layer of the atmosphere?
Ans. Thermosphere.
15. Name some planetary winds.
Ans. Trade wind, westerlies and polar wind.
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