Air, Respiration & Pollution

Which gas makes up 21% of the air?

• Argon

• Carbon dioxide

• Nitrogen

• Oxygen

Which one of the following gases is dissolved under pressure in fizzy drinks?

• Argon

• Carbon dioxide

• Carbon monoxide

• Oxygen

Which one of the following pollutant gases is the main cause of acid rain?

• Carbon dioxide

• Carbon monoxide

• Sulphur dioxide

• Methane

Which gas is the main contributor to the problem of global warming?

• Ozone

• CFCs

• Carbon dioxide

• Carbon monoxide

Some advertising signs contain light which makes them more visible and attractive. Which of the following gases produces this light?

• Neon

• Argon

• Helium

• Hydrogen

Which gas makes up 78% of air?

• Oxygen

• Carbon dioxide

• Helium

• Nitrogen

Which gas is needed to start and keep a fire going?

• Oxygen

• Carbon dioxide

• Helium

• Nitrogen

Which gas is very nonreactive, so people use it in sealed food packaging to stop food from spoiling?

• Oxygen

• Carbon dioxide

• Helium

• Nitrogen

Which gas in used in most fire extinguishers?

• Oxygen

• Carbon dioxide

• Helium

• Nitrogen

Which gas is used inside incandescent light bulbs and stops the white hot metal filament from reacting with oxygen and snapping.

• Argon

• Neon

• Helium

• Oxygen