What is carbon?

• A type of molecule

• A type of atom

• A type of cell

• A type of compound

Which of the following items contains carbon?

• Only the diamond

• Only the leaf

• All of them

• None of them

What is one of the most important atoms that make up biotic matter?

• Oxygen

• Hydrogen

• Carbon

• Nitrogen

Which of the following is an example of energy storage molecules that contain carbon?

• Water

• Glucose

• Salt

• Oxygen

What is the black substance in a pencil tip commonly called?

• Lead

• Ink

• Graphite

• Charcoal

Which of the following is a form of carbon that is one of the hardest substances on Earth?

• Graphite

• Diamond

• Steel

• Plastic

What is the invisible gas in the air that contains carbon?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium

What is carbon dioxide partly made up of?

• Oxygen

• Hydrogen

• Carbon

• Nitrogen

In what form do you give off carbon when you breathe out?

• Carbon monoxide

• Carbon dioxide

• Methane

• Oxygen

What type of matter does carbon dioxide become part of in Earth's atmosphere?

• Biotic matter

• Abiotic matter

• Organic matter

• Inorganic matter