carbon

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

Combustion is another word for __________.

• Transportation
• Respiration
• Fossil Fuels
• Burning

The circulation of the element Carbon among Earth's atmosphere, land, oceans, and organisms is called _____________.

• the Carbon Cycle

• the Oxygen Cycle

• the Carbon dioxide Cycle

• the Water Cycle

All of the carbon in existence is continually recycled in the carbon cycle

• True
• False

How is the burning of fossil fuels related to global warming?

• Magic
• Fuels are hot
• Greenhouse effect
• Photosynthesis

Plants use ____________ to make their own food

• Water

• Sunlight

• Carbon dioxide

• All of these

Which gas do plants release, that humans depend on for survival?

• Water

• Carbon Dioxide

• Oxygen

• Sugar

Carbon atoms cannot be created or destroyed

• True

• False

• Not enough information to answer

What are greenhouse gases?

• gases that cause climate change
• gases that emit green smoke
• gases that are used to make green colored glass

The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?

• lower levels of ozone in the atmosphere
• lower levels of nitrogen in the atmosphere
• higher levels of carbon dioxide in the atmosphere
• higher levels of oxygen in the atmosphere