Understanding the Carbon Cycle

Which process removes carbon dioxide from the atmosphere and stores it in plants?

• Respiration

• Photosynthesis

• Combustion

• Decomposition

What is the main greenhouse gas released when fossil fuels are burnt?

How does deforestation affect the carbon cycle?

• Increases the amount of carbon stored in trees

• Decreases the amount of carbon dioxide in the atmosphere

• Increases the amount of carbon dioxide in the atmosphere

• Has no effect on carbon levels

Which equation best represents photosynthesis?

What is one major consequence of increased carbon dioxide dissolving in the oceans?

• Ocean salinity increases

• Ocean acidification

• Ocean temperature decreases

• Ocean currents stop

Which human activity is a significant source of carbon emissions in Australia?

• Planting native forests

• Burning coal for electricity

• Using solar panels

• Recycling aluminium cans

How does ocean acidification affect marine life?

• It makes it easier for corals to build their skeletons

• It has no effect on marine organisms

• It makes it harder for shellfish and corals to form shells and skeletons

• It increases the growth rate of all fish

Which of the following is NOT a way humans add carbon dioxide to the atmosphere?

• Driving petrol-powered cars

• Burning fossil fuels

• Planting trees

• Deforestation

What is the relationship between the carbon cycle and climate change?

• The carbon cycle has no impact on climate

• Increased carbon dioxide in the atmosphere enhances the greenhouse effect, leading to climate change

• The carbon cycle only affects ocean currents

• Climate change causes the carbon cycle to stop

Which of the following best describes the role of fossil fuels in the carbon cycle?

• They are a short-term carbon store that is quickly recycled

• They are a long-term carbon store that releases carbon when burnt

• They absorb carbon dioxide from the atmosphere

• They have no carbon content