7ALP - Understanding Earth's Carbon Cycle (level 9)

Which process in the carbon cycle involves plants converting carbon dioxide into glucose?

• Respiration

• Photosynthesis

• Combustion

• Vulcanism

What is the primary greenhouse gas emitted through the combustion of fossil fuels?

• Methane

• Nitrous oxide

• Carbon dioxide

• Ozone

Which Earth system is directly affected by weathering in the carbon cycle?

• Atmosphere

• Biosphere

• Hydrosphere

• Lithosphere

What is the main effect of deforestation on the carbon cycle?

• Increases oxygen levels

• Decreases carbon dioxide levels

• Increases carbon dioxide levels

• Decreases methane levels

Which process releases carbon dioxide back into the atmosphere from living organisms?

• Photosynthesis

• Respiration

• Weathering

• Vulcanism

How does vulcanism contribute to the carbon cycle?

• Absorbs carbon dioxide

• Releases carbon dioxide

• Converts carbon dioxide to oxygen

• Stores carbon dioxide

Which of the following activities is NOT a major contributor to human-induced climate change?

• Power generation

• Deforestation

• Photosynthesis

• Transportation

What is the role of the hydrosphere in the carbon cycle?

• It stores carbon in the form of fossil fuels

• It absorbs carbon dioxide from the atmosphere

• It releases carbon dioxide through combustion

• It converts carbon dioxide to methane

Which of the following is a method to mitigate climate change?

• Increasing fossil fuel use

• Reducing resource consumption

• Expanding deforestation

• Increasing manufacturing emissions

What is the effect of increased greenhouse gas emissions on Earth's temperature?

• Decreases temperature

• Increases temperature

• No effect on temperature

• Stabilises temperature