________ and ________ Are the Two Common Gases That Lessen

question 25

Multiple Choice

________ and ________ are the two common gases that lessen re-radiation of heat back into the space and, hence, contribute to increasing temperatures on Earth.

• A) CFCs (chlorofluorocarbons); halons
• B) Carbon dioxide; methane
• C) Sulfur dioxide; nitric acid
• D) Nitrogen gas (N₂); ammonia
• E) Water vapor; nitrogen gas (N₂)

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Definitions:

Phosphorus

A chemical element, essential for life, involved in many cellular processes, including energy transfer and the structure of DNA and RNA.

Inhalation

The act of drawing air or other substances into the lungs.

Primary Consumers

Organisms that feed directly on producers in a food chain, typically herbivores that eat plants.

Trophic Level

The position an organism occupies in a food chain, indicating its level of feeding and energy transfer.