Carbon Cycle Unit Review

Plants use ______ from the air, and energy from sunlight to make food

• Carbon dioxide

• water

• oxygen

• glucose

The chemical formula for photosynthesis

• C6H12O6+6O2 -> 6CO2+6H20+energy

• C6H12O6+6H2O -> 6CO2+6H20

• 6CO2+6H20 -> C6H12O6+6O2

• 6CO2+H20 -> C6H12O6+6O2

Which MOLECULES are rearranged during photosynthesis to make the sugars?

• carbon and hydrogen

• carbon dioxide and water

• carbon, hydrogen and oxygen

• carbon dioxide and sunlight

Plants require carbon dioxide for the process of

• condensation

• photosynthesis

• respiration

• transpiration

Carbon enters the food web via ________ through the process of________

• producers; photosynthesis

• land plants; metabolism

• producers; respiration

• trees; transpiration

All of these factors increase the rate of photosynthesis except

• increasing light intensity

• increasing temperature

• increasing carbon dioxide

• decreasing temperature

All of these factors decrease the rate of photosynthesis except

• decreasing light intensity

• decreasing temperature

• decreasing carbon dioxide

• increasing carbon dioxide

true or false: carbon dioxide comes from fertilizer in the soil

• true

• false

true or false: oxygen comes from the atmosphere to be used for photosynthesis

• true

• false

true or false: carbon dioxide comes from the atmosphere to be used for photosynthesis

• true

• false