ESS Topic 2.3

What is the primary role of biogeochemical cycles?

• To recycle essential nutrients for living organisms

• To decrease biodiversity

• To promote fossil fuel usage

• To increase atmospheric CO2 levels

Which of the following is a major component of the carbon cycle?

• Photosynthesis

• Water evaporation

• Nitrogen fixation

• Phosphorus mining

Which process converts atmospheric nitrogen into a form usable by plants?

• Combustion

• Nitrogen fixation

• Photosynthesis

• Respiration

What is the primary greenhouse gas released by burning fossil fuels?

• Nitrous oxide

• Methane

• Ozone

• Carbon dioxide

Which of the following is a natural carbon sink?

• Forests

• Cars

• Factories

• Plastic waste

What is the process by which CO2 is absorbed into the oceans?

• Dissolution

• Evaporation

• Condensation

• Sublimation

What is the main consequence of ocean acidification?

• Decreased sea levels

• Increased fish populations

• Enhanced coral growth

• Harm to marine organisms with calcium carbonate shells

Which agricultural practice can enhance soil as a carbon sink?

• Heavy tillage

• Crop rotation

• Monoculture

• Pesticide use

Which process is responsible for converting nitrates back into nitrogen gas?

• Ammonification

• Nitrification

• Assimilation

• Denitrification

What is the main impact of increased atmospheric CO2 on oceans?

• Ocean acidification

• Increased salinity

• Enhanced wave activity

• Decreased temperature