ماحولیاتی کیمیا: فضا

The most abundant gas in the atmosphere is:

• 1 Oxygen
• 2 Nitrogen
• 3 Argon
• 4 Carbon dioxide

The gas mainly responsible for the greenhouse effect from burning fuels is:

• 1 Oxygen
• 2 Helium
• 3 Carbon dioxide
• 4 Nitrogen

Acid rain is caused mainly by oxides of:

• 1 Hydrogen
• 2 Noble gases
• 3 Sulphur and nitrogen
• 4 Carbon only

The ozone layer protects us from:

• 1 Ultraviolet radiation
• 2 Infrared radiation
• 3 Sound
• 4 Radio waves

CFCs are harmful because they:

• 1 Cool the Earth
• 2 Make rain acidic
• 3 Increase oxygen
• 4 Deplete the ozone layer

The percentage of oxygen in the air is about:

• 1 21 percent
• 2 78 percent
• 3 50 percent
• 4 0.04 percent

The gas that makes up about 0.04 percent of air is:

• 1 Argon
• 2 Oxygen
• 3 Carbon dioxide
• 4 Nitrogen

Smog is a mixture of smoke and:

• 1 Wind
• 2 Rain
• 3 Fog
• 4 Snow

Burning fossil fuels increases the level of:

• 1 Nitrogen
• 2 Carbon dioxide
• 3 Oxygen
• 4 Helium