Q: Answer the question

Greenhouse gases in the atmosphere trap heat near Earth's surface. Which of these is a greenhouse gas?
OPTIONS:
- nitrogen
- argon
- water vapor
- oxygen

A: water vapor

Q: Answer the question

A student is playing with a small toy boat on a pond. The student throws a rock in the pond. This creates waves that move the boat toward the shore. The boat moves toward the shore because the waves transfer
OPTIONS:
- energy.
- heat.
- motion.
- water.

A: energy.

Q: Answer the question

What does a mirror do to light that causes objects to appear backwards?
OPTIONS:
- refracts
- reflects
- absorbs
- blocks

A:
reflects