Q: Answer the question

According to the Big Bang Theory, how is the universe changing?
OPTIONS:
- It is contracting.
- It is expanding.
- Only the rim is expanding.
- Only the center is contracting.

A: It is expanding.

Q: Answer the question

Light rays are focused by the lens of a camera through the process of
OPTIONS:
- reflection.
- refraction.
- dispersion.
- diffraction.

A: refraction.

Q: Answer the question

What is the most reasonable explanation for why a toy car rolls farther on a wood floor than on a thick carpet?
OPTIONS:
- The car weighs more on the carpet.
- The car weighs more on the floor.
- The carpet has more resistance.
- The floor has more traction.

A:
The carpet has more resistance.