Ecosystems

What is carbon dioxide?

• A pure element that contributes to the ozone layer.

• A colorless, odorless gas composed of carbon and oxygen, absorbed by plants.

• A solid type of carbon used primarily in fuel.

• A pollutant only emitted from industrial activities.

Which term describes the movement of carbon atoms through the atmosphere and organisms?

• Carbon dioxide

• Carbon cycle

• Carbon footprint

• Carbon monoxide

What is the primary role of decomposers in the ecosystem?

• To produce oxygen through photosynthesis

• To break down dead plant and animal cells for energy

• To pollinate plants

• To consume other organisms for energy

What was a significant outcome of the Industrial Revolution?

• Decrease in global trade

• Mechanization of goods production

• Reduction in the use of steam engines

• Increase in manual labor in factories

What defines a molecule?

• The largest particle of a substance that can exist by itself

• A substance made from a single type of atom

• The smallest particle of a substance that retains all the substance's properties

• A compound that changes its properties under different temperatures

Organisms that do not decompose naturally can be buried and become what?

• oxygen

• nutrients

• calcium carbonates

• fossil fuels

Which part of the carbon cycle involves animals breathing in oxygen and out carbon dioxide?

• combustion

• respiration

• photosynthesis

• decay

The movement of carbon from the nonliving environment into the living environment and back.

• Carbon Cycle
• Water Cycle
• Cellular Respiration
• Photosynthesis

Which removes carbon from the atmosphere?

• Combustion

• Respiration

• Photosynthesis

• Death

The burning of forests and fossil fuels releases carbon into the carbon cycle. How could this impact an ecosystem?

• The amount of organic carbon in the soil could increase.

• The amount of carbon dioxide dissolved in water could increase.

• The amount of organic carbon in the atmosphere could decrease.

• The amount of carbon dioxide available for photosynthesis could decrease.