With regards to ozone, which of the following is incorrect?

• A. Ozone is a triatomic molecule

• B. Ozone layer aids in preventing excess ultraviolet radiation from reaching the earth

• C. Ozone is a natural greenhouses gas

• D. Ozone comprises of oxygen molecules only

• E. Ozone layer brings about a global warming on earth

• F. Ozone is present in the stratosphere

The atmosphere makes the followings possible on earth except _____.

• A. Photosynthesis

• B. Respiration

• C. Rain

• D. Ultraviolet rays

• E. Global communication

• F. Weather

The interface forming a boundary between the stratosphere and mesosphere is termed _____.

• A. Mesoface

• B. Mesopause

• C. Mesostart

• D. Stratoface

• F. Stratopause

• F. Stratostart

Which layer of atmosphere is closest to the earth?

• A. Thermosphere

• B. Mesosphere

• C. Stratosphere

• D. Ionosphere

• E. Troposphere

• F. Exosphere

Argon makes up _____ percent of the atmosphere.

• A. 0.93

• B. 0.002

• C. 0.0005

• D. 0.00009

• E. 0.00005

• F. 0.036

The atmosphere consists of gases that surround the entire surface of the spherical shaped earth. The compositions of these gases are as follows:

• Nitrogen (N₂): 78.09%
• Oxygen (O₂): 20.95%
• Argon (Ar): 0.93%
• Carbon(IV)oxide (CO₂): 0.036%
• Neon (Ne): 0.002%
• Krypto (Kr): 0.001%
• Helium (He): 0.0005%
• Xenon (Xe): 0.00009%
• Hydrogen (H₂): 0.00005%
• Water Vapour: Variable

All of these gases (listed above) make up the atmosphere and are generally called air.

Please read more on the atmosphere and it's composition here