Importance of carbon

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

• Carbon

• Glucose

Which reason best explains why living things need carbon?

• Carbon bonds are a source of energy.

• Carbon bonds are NOT a source of energy.

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

• Carbon can bond with many elements.

• Carbon CANNOT bond with many elements.

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

• Carbon-based macromolecules are found in living things.

• Carbon-based macromolecules are NOT found in living things.

What happens when humans burn fossil fuels?

• Carbon is released into the atmosphere.

• Carbon is NOT released into the atmosphere.

By which process are fossil fuels formed?

• decomposition

• Cellular respiration

What is the primary function of the carbon cycle?

• recycling the supply of carbon on Earth

• recycling the supply of water on Earth

What is stored in carbon bonds?

• Energy

• Water

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

• Life would cease to exist.

• Only plants would be affected.

In what form is carbon found in the atmosphere?

• CO2

• C6H12O6

• H2O

• ATP