Trees, seas and soil

What is a carbon sink?

• A system that absorbs more carbon than it releases
• A type of tree that grows in the ocean
• A method of burning fossil fuels
• A process that releases carbon into the atmosphere

Which of the following is NOT one of the main carbon sinks?

• Oceans
• Soil
• Deserts
• Forests

Which process do plants use to absorb carbon dioxide?

• Photosynthesis
• Respiration
• Decomposition
• Evaporation

How can individuals help improve carbon sinks?

• By using more plastic
• By cutting down trees
• By driving more often
• By reducing fossil fuel usage

What human activity significantly contributes to excess carbon dioxide in the atmosphere?

• Planting trees
• Burning fossil fuels
• Composting organic waste
• Using public transport

What is one consequence of climate change on carbon sinks?

• Increased tree growth
• More frequent forest fires
• Less ocean acidity
• More carbon absorption by soil

What is the role of phytoplankton in the carbon cycle?

• They absorb carbon dioxide from the ocean
• They release carbon into the atmosphere
• They are a type of fossil fuel
• They help trees grow faster

What happens to carbon when forests are burned?

• It is stored in the ocean
• It becomes part of the soil
• It is released into the atmosphere
• It is absorbed by new trees

What is humus?

• A method of photosynthesis
• A kind of marine life
• A type of fossil fuel
• Decomposed organic matter rich in carbon

What is the significance of the carbon cycle in relation to climate change?

• It shows how carbon is exchanged in the environment
• It explains how to grow more trees
• It describes the process of photosynthesis
• It highlights the importance of fossil fuels