The universe has many different components. Which list places four components of the universe in the most likely order from smallest to largest?

• Planets, stars, galaxies, nebulae

• Nebulae, stars, planets, galaxies

• Galaxies, stars, planets, nebulae

• Planets, stars, nebulae, galaxies

Tags

112.20.b.8.A

Reorder the following in order from smallest to largest.

• Nebula

• Star

• Galaxy

• Planet

Tags

112.20.b.8.A

Which of these correctly compares the masses of different objects in the universe?

• A moon has less mass than a star and more mass than the planet it orbits.

• A planet has less mass than a galaxy and more mass than the star it orbits.

• A galaxy has less mass than a moon and more mass than a planet.

• A star has less mass than a galaxy and more mass than a planet.

Tags

112.20.b.8.A

The Milky Way galaxy is best described as a disk of stars orbiting a central point on the disk. Which of these best explains why people on Earth cannot see the entire shape of the Milky Way?

• Earth is a part of this galaxy.

• Many more stars exist outside the galaxy.

• The stars in the center of the galaxy are extremely small.

• The center of the galaxy consists of a dense cluster of stars.

Tags

112.28.b.9.B

With the use of the Hubble Space Telescope, scientists recently discovered a giant runaway star. It is 90 times larger than the sun and is very hot and blue-white in color. Why does the sun appear to be brighter than this runaway star when viewed from Earth?

• The sun is a different color than the runaway star

• The sun is older than the runaway star

• The sun is closer to Earth than the runaway star

• The sun is made of different elements than the runaway star

Tags

112.20.b.8.A

Which sequence correctly lists the relative sizes from largest to smallest?

• Our solar system, universe, Milky Way Galaxy

• Our solar system, Milky Way Galaxy

• Universe, our solar system, Milky Way Galaxy

• Universe, Milky Way Galaxy, our solar system

Tags

112.20.b.8.A

Reorder the following in the correct order from largest to smallest.

• Earth

• Our Solar System

• Sun

• Universe

• Milky Way Galaxy

Tags

112.20.b.8.A

Correctly complete the diagram to best represent the size relationships among galaxies, stars, and the universe.

a

b

c

Universe

Galaxies

Stars

Tags

112.20.b.8.A

Why does Earth get more energy from the sun than from all the other stars in the universe combined?

• The sun is much larger than the other stars

• The sun is much hotter than the other stars

• The sun is much more dense than the other stars

• The sun is much closer than the other stars

Tags

112.20.b.8.A

Correctly label the diagram to best represent the relationship between galaxies, the universe, and nebulae?

c

b

a

Nebulae

Galaxies

Universe

Tags

112.20.b.8.A