Question

1. choose the correct answer.

carbon dioxide might cause the atmosphere to get warmer because ____.
carbon dioxide traps sunlight
carbon dioxide traps heat
carbon dioxide decreases with most energy use
carbon dioxide reflects sunlight

1. choose the correct answer.

why might it be important to replant trees when companies remove them from forests?
because they help clean the air
because they make water taste better
because they create rain
because they help make the forest look pretty

Explanation:

Question 1

To solve this, we analyze each option:

• "carbon dioxide traps sunlight": Incorrect, as CO₂ traps heat (infrared radiation), not sunlight directly.
• "carbon dioxide traps heat": Correct, CO₂ is a greenhouse gas that traps heat (radiant energy) in the atmosphere, causing warming.
• "carbon dioxide decreases with most energy use": Incorrect, energy use (e.g., burning fossil fuels) increases CO₂.
• "carbon dioxide reflects sunlight": Incorrect, CO₂ does not reflect sunlight; it absorbs and re - emits heat.

We evaluate each option:

• "because they help clean the air": Correct, trees absorb pollutants (like CO₂) and release oxygen, cleaning the air.
• "because they make water taste better": Incorrect, trees do not affect water taste.
• "because they create rain": Incorrect, while trees influence local climate, they do not “create” rain.
• "because they help make the forest look pretty": Incorrect, replanting is for ecological, not aesthetic, reasons (primarily).

Answer:

B. carbon dioxide traps heat

Question 2