Quiz on Carbon Dioxide and the Greenhouse Effect

What percentage of carbon dioxide is present in the atmosphere by volume?

• 0.02%

• 0.038%

• 0.057%

• 0.1%

Which process removes carbon dioxide from the atmosphere?

• Decay of organic matter

• Photosynthesis

• Respiration

• Combustion

What is the greenhouse effect primarily responsible for?

• Enhancing photosynthesis

• Decreasing oxygen levels

• Maintaining a favorable environmental temperature

• Increasing atmospheric pressure

Which gas is NOT mentioned as a greenhouse gas in the text?

• Water vapour

• Oxygen

• Methane

• Carbon dioxide

What is the main source of oxides of nitrogen in the atmosphere?

• Photosynthesis

• Respiration

• Combustion of fossil fuels

• Decay of organic matter

What are chlorofluorocarbons (CFCs) primarily used for?

• Fertilizers

• Propellants in aerosol cans

• Fuel for vehicles

• Pesticides

Which gas is described as more efficient at heat retention than carbon dioxide?

• Ozone

• Methane

• Nitrous oxide

• Water vapour

What happens to much of the heat radiated by the Earth?

• It escapes into space

• It is absorbed by the oceans

• It is reflected back by clouds

• It is converted into energy

What is the primary role of greenhouse gases in the atmosphere?

• To cool the Earth

• To absorb infrared radiation

• To produce oxygen

• To enhance combustion

What is the current trend regarding atmospheric carbon dioxide levels?

• They are decreasing

• They are fluctuating

• They are stable

• They are rising