Carbon Cycle Basics

Carbon Cycle

Look at the picture. The arrows show where the carbon goes.

Multiple Choice

How long does it take carbon to move through the cycle?

• a week

• a year

• tens of years

• hundreds, thousands or millions of years

Multiple Choice

Which gas do plants release, that humans depend on for survival?

• Water

• Carbon Dioxide

• Oxygen

• Sugar

Multiple Choice

All of the carbon in existence is continually recycled in the carbon cycle

• True
• False

​*** Plants and animals create energy for themselves through cellular respiration.

Multiple Choice

Plants use ____________ to make their own food

• Water

• Sunlight

• Carbon dioxide

• All of these

Multiple Choice

Respiration is the process by which animals take in _____ and release _____. 

• photosynthesis, air
• carbon, oxygen
• oxygen
• oxygen, carbon dioxide

Multiple Choice

Oxygen is a gas produced by ___ and used by  ____ 

• plants and animals 
• photosynthesis and carbon dioxide 
• animals and plants 
• carbon dioxide and photosynthesis

Multiple Choice

What type of organism receives carbon present in dead plants and animals?

• producer

• primary consumer

• secondary consumer

• decomposer

Multiple Choice

When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.

• Water
• Atmosphere
• Sun
• Air

Multiple Choice

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

Multiple Choice

Which statement is an example of how carbon moves through a food chain as part of the cycle?

• Producers (animals) release carbon dioxide through cellular respiration, and consumers (plants) take it in for photosynthesis.

• Producers (animals) take in carbon dioxide, and consumers (animals) release it.

• Producers (animals) take in carbon from the soil, and they release it when they decompose.

• Producers (animals) release carbon into the soil, and consumers take it in from the soil.

Multiple Choice

Organisms that do not decompose can be buried and become what?

• water
• nutrients
• air
• fossil fuels

Multiple Select

Which process(es) release carbon dioxide into the atmosphere?

• respiration

• combustion

• photosynthesis

• feeding

Multiple Choice

Which process removes carbon dioxide from the atmosphere?

• deforestation

• tree farms

• burning fossil fuels

• cellular respiration

Multiple Choice

When organisms die, what process returns their carbon back into the atmosphere?

• Respiration

• Decomposition

• Combustion

• Erosion