4.1 Carbon Cycle

oxygen is a gas produced by _ and used by  _ 

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

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

• True
• False

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

What does NOT produce carbon dioxide?

• Photosynthesis
• Burning Fossil Fuels
• Animal respiration
• Plants decaying

Combustion is another word for __________.

• Transportation
• Respiration
• Fossil Fuels
• Burning

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

• Water

• Carbon Dioxide

• Oxygen

• Sugar

Plants use ____________ to make their own food

• Water

• Sunlight

• Carbon dioxide

• All of these

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

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

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

• Producers release carbon dioxide, and consumers take it it.

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

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

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

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

• water
• nutrients
• air
• fossil fuels