Question

match each definition with the appropriate term.
the distance between earth and the sun, about 93 million miles (150 million kilometers)
a. dark matter
b. astronomical unit (au)
a hypothetical form of energy that influences the universe
c. dark energy
a hypothetical form of matter that is not visible but influences the structure of galaxies
d. light - year
gas and dust between the stars
e. interstellar gas and dust
f. plasma

Explanation:

The distance between Earth and the Sun, about 93 million miles (150 million kilometers) is defined as an astronomical unit (au). Dark energy is a hypothetical form of energy that influences the universe. Dark matter is a hypothetical form of matter that is not visible but influences the structure of galaxies. Gas and dust between the stars is interstellar gas and dust.

Answer:

1. b. astronomical unit (au)
2. c. dark energy
3. a. dark matter
4. e. interstellar gas and dust