Answers FL-2000310-Biology 1 AThe Importance of Carbon

The Importance of Carbon Answers

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What happens when humans burn fossil fuels?

Carbon is released into the atmosphere.

Carbon is removed from the atmosphere.

Carbon is added to the the carbon cycle.

Carbon is destroyed.

Which reason best explains why living things need carbon?

Carbon bonds are a source of energy.

Carbon levels reduce global temperatures.

Carbon acts as an important solvent.

Carbon is everywhere.

Which substance is considered a building block for all living things?

hydrogen

glucose

carbon

protein

What is stored in carbon bonds?

water

energy

glucose

ATP

How will the level of carbon in the atmosphere change if humans do nothing to reduce their impact on the carbon cycle?

Carbon will be removed from the atmosphere altogether.

The level of carbon in the atmosphere will decrease.

Carbon in the atmosphere will remain the same.

The level of carbon in the atmosphere will increase.

Which statement best illustrates why carbon is so important to life on Earth?

Carbon occurs as a solid, a liquid, and a gas.

Carbon is found in both the living and nonliving worlds.

Carbon is stored in large quantities in fossil fuels.

Carbon-based macromolecules are found in living things.

The table below shows the level of carbon dioxide in the atmosphere for a period of 50 years.Carbon Dioxide LevelWhat conclusion can you make about how the carbon dioxide level has changed over time?

The level has not changed.

The level of CO2 has declined.

The level of CO2 has risen.

The level has reached its maximum.

What would most likely happen to life on Earth if the carbon cycle stopped?

Life would continue unchanged.

Life would cease to exist.

Only plants would be affected.

Only animals would be affected.

By which process are fossil fuels formed?

burning

photosynthesis

decomposition

cellular respiration

Look at the levels of carbon dioxide in the data table below.Carbon in the AtmosphereBy how much did carbon dioxide levels increase from 1980 to 2000?

22 ppm

32 ppm

45 ppm

51 ppm

Which reason best explains why carbon is able to form macromolecules?

Carbon is a very large element.

Carbon can bond with many elements.

Carbon is found in all living things.

Carbon is found in energy-storing molecules.

Which action would most likely increase the amount of carbon in the environment?

choosing to burn coal to generate electricity

using energy-efficient appliances in place of older, traditional appliances

reusing shopping bags instead of using disposable plastic bags

recycling paper and plastic instead of throwing it in the trash

Which pair of molecules both contain carbon atoms?

fats and proteins

water and carbohydrates

nucleic acids and water

oxygen gas and fats

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