19.1/19.2 1·The most abundant gas in the atmosphere is oxygen. B) nitrogen. wate

Question

19.1/19.2 1·The most abundant gas in the atmosphere is oxygen. B) nitrogen. water vapor. D) carbon dioxide. 2. Which of the following gases is a trace natural constituent of the air? A) CO B) SO2 D) NO2 Approximately what percentage of insolation reaches the earth's surface? A) 50% B)40% C) 75% D) 33% 3. 4. Photosynthesis producesin the atmosphere. A) carbon dioxide B) oxygen C) argon D) carbon monoxide 5The ozone layer lies in the A) stratosphere. B) troposphere. C) mesosphere. D) thermosphere. 6. About 80% of the mass of the atmosphere and most of the clouds and water vapor are located in the A) stratosphere. B) troposphere C) mesosphere. D) thermosphere. 7. A molecule with three atoms of oxygen is A) oxygen gas. B) ozone C) carbon dioxide. D) carbon monoxide. 8. Weather occurs in the A) stratosphere. B) troposphere. C) mesosphere. D) thermosphere 9. The coldest region of the atmosphere is the A) stratosphere. B) troposphere. C) mesosphere. D) thermosphere. Page 1

Explanation / Answer

1- Nitrogen

2- CO2

3-50%

4-Oxygen

5-Meso sphere

6-Stratosphere

7-Ozone

8-Tropsphere

9-Mesosphere

10-Thermosphere and exosphere

11-Greenhouse Effect

12-Rayleigh Scattering

13-Carbon Dioxide and NO2

14-Preferential scattering of light by gas molecule.

15-Absorption of terrestrial Radiation

16- Albido

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