Carbon Cycle Quiz

What is the primary source of energy for Earth's biosphere?

• Wind

• Water

• Sunlight

• Geothermal heat

Which of the following is considered a closed system for water, minerals, and nutrients?

• Hydrosphere

• Atmosphere

• Biosphere

• Lithosphere

What is the byproduct of photosynthesis?

• Water vapor

• Oxygen

• Nitrogen

• Carbon dioxide

How do animals obtain carbon for energy?

• By absorbing it from the soil

• By consuming plants or other animals

• By breathing in carbon dioxide

• By absorbing it from the atmosphere

What role do decomposers play in the carbon cycle?

• They store carbon in the soil

• They release oxygen into the atmosphere

• They absorb carbon dioxide from the atmosphere

• They break down solid waste and release carbon dioxide

Which of the following processes decreases the amount of carbon dioxide in the atmosphere?

• factories burning fossil fuels

• photosynthesis

• erosion

• 

Photosynthesis

• absorbs CO₂

• releases CO₂

According to the diagram, what are the reservoirs of carbon? (Select more than one...)

• Oceans

• Vegetation, Soil, & Rock

• Fossil Fuels (underground)

• Atmosphere

What are the products of cellular respiration (ignoring ATP)?

• Carbon dioxide and water

• Carbon dioxide and oxygen

• Glucose and oxygen

• Glucose and water

What reaction does this chemical equation represent?

• Cellular respiration

• Photosynthesis