1 Which gas is mainly responsible for the greenhouse effect? A Nitrogen B Oxygen C Carbon dioxide D Argon
2 Which layer of the atmosphere is closest to the Earth's surface? A Stratosphere B Mesosphere C Troposphere D Thermosphere
3 Acid rain is mainly caused by the reaction of water vapour with: A Sulphur dioxide and nitrogen oxides B Carbon dioxide and oxygen C Nitrogen and argon D Oxygen and ozone
4 Which air pollutant is mainly produced by the incomplete combustion of fossil fuels? A Carbon dioxide B Sulphur dioxide C Carbon monoxide D Nitrogen
5 Which international agreement was made to limit the release of gases that damage the ozone layer? A Kyoto Protocol B Montreal Protocol C Paris Agreement D Geneva Convention
6 The Montreal Protocol is an international agreement to protect: A Ozone layer B Forests C Oceans D Soil
7 Which gases are the main sources of acid rain? A Oxygen and nitrogen B Sulphur dioxide and nitrogen oxides C Argon and carbon dioxide D Water vapour and oxygen
8 Which strategy helps to reduce environmental issues by absorbing carbon dioxide? A Using catalytic converters B Afforestation C Waste management D International agreements
10 The natural greenhouse effect is important because it: A Makes Earth too hot B Keeps Earth warm enough for life C Causes acid rain D Depletes the ozone layer
11 Which gas is present in the highest percentage in the Earth's atmosphere? A Oxygen B Nitrogen C Carbon dioxide D Argon
12 Which gas is a major component of the atmosphere and is inert? A Oxygen B Nitrogen C Carbon dioxide D Argon
13 Which of the following is a natural greenhouse gas? A CFCs B Water vapour C Sulphur dioxide D Carbon monoxide
14 Which air pollutant is a major component of photochemical smog and is produced by vehicle exhaust? A Sulphur dioxide B Nitrogen oxides C Carbon monoxide D Particulates
15 Which gas makes up the largest portion of Earth's atmosphere? A Oxygen B Nitrogen C Carbon dioxide D Argon
16 Which layer of the atmosphere contains the ozone layer? A Troposphere B Stratosphere C Mesosphere D Thermosphere
17 Which of the following is an effect of acid rain? A Increase in soil fertility B Damage to buildings and statues C Decrease in water pollution D Increase in plant growth
18 Which of the following is a way to reduce environmental problems caused by vehicles? A Increasing coal burning B Using catalytic converters C Adding more CFCs to the air D Cutting down forests
19 Catalytic converters are used in vehicles to: A Increase fuel consumption B Reduce harmful emissions C Produce carbon monoxide D Increase engine noise
21 Which gas is produced by the anaerobic decay of organic matter in wetlands? A Carbon dioxide B Methane C Oxygen D Nitrogen
22 Which of the following helps to reduce carbon dioxide in the atmosphere? A Deforestation B Afforestation C Burning forests D Using more fossil fuels
23 Which human activity is a major source of carbon dioxide in the atmosphere? A Burning of fossil fuels B Growing of trees C Boiling of water D Melting of ice
24 Which of the following is NOT a strategy to reduce environmental issues? A Afforestation B Using renewable energy C Increasing the use of fossil fuels D Waste management
25 Which air pollutant is mainly produced by the incomplete burning of fuels? A Carbon monoxide B Argon C Water vapour D Nitrogen