IGCSE 10.3 Air quality and climate

What is the main component of Earth's atmosphere?

• Oxygen

• Nitrogen

• Hydrogen

• Carbon dioxide

What is the second most abundant component of Earth's atmosphere?

• Carbon dioxide

• Oxygen

• Nitrogen

• Chlorofluorocarbons

Which of these gases is a greenhouse gas?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium

Which gas makes up about 78% of Earth's atmosphere?

• Oxygen
• Nitrous oxide
• Nitrogen
• Carbon dioxide

Which is the most abundant noble gas in the atmosphere?

• Argon
• Helium
• Xenon
• Krypton

If the Earth's atmosphere is made up of 99% nitrogen and oxygen,what is the composition of the remaining 1%

• a mixture of noble gases and NO2

• a mixture of noble gases and SO2

• a mixture of noble gases and CO2

• ozone, chlorine and CO2

Where does CO2, as a pollutant, in Earth's atmosphere come from?

• complete combustion of fuels

• complete combustion of carbon-containing fuels

• Respiratory processes in living things

• incomplete combustion of carbon-containing fuels

Where does CO, as a pollutant, in Earth's atmosphere come from?

• complete combustion of fuels

• complete combustion of carbon-containing fuels

• Respiratory processes in living things

• incomplete combustion of carbon-containing fuels

Where do oxides of nitrogen in Earth's atmosphere come from?

• complete combustion in car engines without a catalystic converter that have a relatively high temperature

• complete combustion in car engines with a catalystic converter that have a relatively low temperature

• from the reaction of atmospheric oxygen and nitrogen in the hot temperature of car engines

• complete combustion in car engines with a catalystic converter that have a relatively low temperature

Where doesn't methane in Earth's atmosphere come from?

• decomposition of vegetation

• complete combustion of carbon-containing fuels

• waste gases from animal digestion

• rice fields