What is the most important element that makes up living matter?

• Oxygen

• Nitrogen

• Carbon

• Hydrogen

Which of the following is not an example of carbon-based compounds?

• Proteins

• Simple Sugars

• Oxygen

• Carbohydrates

What is the percentage of carbon dioxide in the Earth's atmosphere at present?

• 0.1%

• 0.5%

• 0.01%

• 0.05%

Which of the following is a natural greenhouse gas?

• Carbon Dioxide

• Argon

• Nitrogen

• Oxygen

What process enables organic life to survive on Earth?

• Photosynthesis

• Greenhouse Effect

• Respiration

• Weathering

What human activity has been increasing the percentage of carbon dioxide in the atmosphere since the 18th century?

• Deforestation

• Burning Fossil Fuels

• Slash and Burn Agriculture

• Afforestation

Which store is the largest store of carbon in the carbon cycle?

• Oceans

• Lithosphere

• Atmosphere

• Biosphere

What is the main reason for the increase in carbon dioxide in the atmosphere over the past 200 years?

• Increased Volcanic Activity

• Deforestation

• Burning Fossil Fuels

• Afforestation

What is the aim of the Kyoto Protocol?

• To reduce collective greenhouse gas emissions

• To accelerate climate change

• To promote burning of fossil fuels

• To increase greenhouse gas emissions

What is the main reason for the increase in carbon dioxide emissions in North America?

• Limited public transport

• Decrease in vehicle fuel usage

• Reduction in electricity consumption

• Decrease in single occupied dwellings