Earth Level 9 Pre-Test (1)

Which process in the carbon cycle involves plants converting carbon dioxide and water into glucose and oxygen using sunlight?

• Respiration

• Photosynthesis

• Combustion

• Weathering

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

• Oxygen

• Nitrogen

• Carbon Dioxide

• Methane

Which of the following processes does NOT directly release carbon dioxide into the atmosphere?

• Photosynthesis

• Respiration

• Vulcanism

• Combustion

How does weathering contribute to the carbon cycle?

• By releasing carbon dioxide from rocks into the atmosphere

• By absorbing carbon dioxide from the atmosphere into rocks

• By converting carbon dioxide into methane

• By burning fossil fuels

Which of the following is a result of vulcanism in the carbon cycle?

• Absorption of carbon dioxide by plants

• Release of carbon dioxide from volcanic eruptions

• Conversion of carbon dioxide into oxygen

• Formation of fossil fuels

In which Earth system does photosynthesis primarily occur?

• Atmosphere

• Biosphere

• Hydrosphere

• Lithosphere

How does the combustion of fossil fuels affect the Earth's atmosphere?

• It decreases the amount of carbon dioxide

• It increases the amount of carbon dioxide

• It has no effect on carbon dioxide levels

• It converts carbon dioxide into oxygen

Which process in the carbon cycle involves the breakdown of organic matter by organisms to release carbon dioxide?

• Photosynthesis

• Respiration

• Weathering

• Vulcanism

How does fire contribute to the carbon cycle?

• By absorbing carbon dioxide from the atmosphere

• By releasing carbon dioxide into the atmosphere

• By converting carbon dioxide into glucose

• By forming fossil fuels

Which Earth system is primarily involved in the storage of carbon in the form of fossil fuels?

• Atmosphere

• Biosphere

• Hydrosphere

• Lithosphere