The Importance Of Carbon: Question Preview (ID: 27462)

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By which process are fossil fuels formed?
a) burning
b) photosynthesis
c) decomposition
d) cellular respiration

By which process do plants obtain carbon from the atmosphere?
a) decomposition
b) photosynthesis
c) cellular respiration
d) burning fossil fuels

Which process is performed by both plants and animals to break down sugars to provide energy in the form of ATP?
a) photosynthesis
b) cellular respiration
c) decomposition
d) glycolysis

What happens when humans burn fossil fuels?
a) Carbon is released into the atmosphere.
b) Carbon is removed from the atmosphere.
c) Temperatures on Earth decrease.
d) Carbon begins to form natural gas

Which pair of molecules both contain carbon atoms?
a) fats and proteins oxygen gas and fats
b) water and carbohydrates
c) nucleic acids and water
d) fats and proteins

Which macromolecule provides the blueprint for living things, by storing and transmitting genetic information?
a) protein
b) lipid
c) nucleic acid
d) carbohydrate

Which reason best explains why carbon is able to form macromolecules?
a) Carbon is a very large element.
b) Carbon can bond with many elements.
c) Carbon is found in all living things.
d) Carbon can only bond with itself.

Which substance is considered a building block for all living things?
a) hydrogen
b) glucose
c) carbon
d) protein

How will the level of carbon in the atmosphere change if humans do nothing to reduce their impact on the carbon cycle?
a) Carbon will be removed from the atmosphere altogether.
b) The level of carbon in the atmosphere will increase.
c) The level of carbon in the atmosphere will decrease.
d) Carbon in the atmosphere will remain the same.

What is the primary function of the carbon cycle?
a) creating macromolecules
b) recycling the supply of water on Earth
c) recycling the supply of carbon on Earth
d) creating fossil fuels

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