1.
What is the universe?
- The solar system
- The Milky Way galaxy
- Everything that exists, including all matter and energy
- The region of space beyond the Earth’s atmosphere
Answer.
c.
Exercises 14.3 Exercise
2.
What is dark energy?
- A mysterious force that is causing the expansion of the universe to accelerate
- A type of energy that is invisible to telescopes
- A force that opposes gravity
- A force that causes galaxies to collide with each other
Answer.
a.
3.
What is a galaxy?
- A group of stars that orbit around a common center of mass
- A single star
- A black hole
- A planet
Answer.
a.
4.
Which force keeps stars in a galaxy from flying off into space?
- Electromagnetic force
- Weak nuclear force
- Strong nuclear force
- Gravitational force
Answer.
d.
5.
What is Hubble’s law?
- The law that describes the expansion of the universe
- The law that describes the gravitational attraction between two bodies
- The law that describes the conservation of energy in a closed system
- The law that describes the behavior of waves in a medium
Answer.
a.
