Understanding Earth's Carbon Cycle

Which process is responsible for converting carbon dioxide into organic matter using sunlight?

• Respiration

• Photosynthesis

• Vulcanism

• Weathering

What is the primary gas released during the combustion of fossil fuels?

• Oxygen

• Nitrogen

• Carbon dioxide

• Methane

Which of the following is a natural process that releases carbon into the atmosphere?

• Photosynthesis

• Respiration

• Fire

• All of the above

Which Earth system is primarily affected by weathering?

• Atmosphere

• Biosphere

• Hydrosphere

• Lithosphere

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

• Cooling of the planet

• Stabilisation of temperatures

• Global warming

• Decrease in sea levels

Which human activity is NOT directly linked to increased carbon emissions?

• Deforestation

• Power generation

• 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 through vulcanism.

• It converts carbon dioxide into oxygen.

Which process involves the breakdown of rocks and minerals, releasing carbon into the environment?

• Vulcanism

• Weathering

• Respiration

• Photosynthesis

What is the primary source of energy for photosynthesis?

• Chemical energy

• Solar energy

• Thermal energy

• Nuclear energy

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

• Increasing deforestation

• Reducing fossil fuel consumption

• Expanding manufacturing

• Increasing transportation emissions