Atmosphere and Environment around us

What is the percentage composition of oxygen gas in the Earth's atmosphere

• 78%

• 21%

• 0.96%

• 0.04%

.................................................................. is associated with the abnormal shift in the planet's weather patterns over time.

What term is given to the condition whereby the Earth's average temperature increases?

• Ozone Depletion

• Respiration

• Global warming

• Combustion

Which gas can be removed from the exhaust gases of a petrol-powered car by its catalytic converter?

• Sulfur dioxide

• Oxygen

• Oxides of nitrogen

• Carbon dioxide

State one natural source and one source which results from human activities of sulfur dioxide.

Answer explanation

Sulfur dioxide (SO₂), its sources and impact on Health

During eutrophication, .......................................... gas present in pond water decreases