The Universe and Stars

Which is listed in the correct order, smallest to largest?

• moon, star, planet, galaxy

• galaxy, star, panet, moon

• moon, planet, star, galaxy

• planet, moon, star, galaxy

Which best describes a nebula?

• A group of billions of stars, plus dust and gas

• A giant ball of burning gas

• A collection of dust and gas, where stars are born

• The massive, explosive death of a high mass star

What kind of galaxy is pictured?

• Spiral

• Elliptical

• Irregular

• Spherical

What is the correct term for an older star that is beginning to run out of fuel, and is expanding and cooling off?

• white dwarf

• red giant

• black dwarf

• prototstar

This star is small, not very bright, but very, very HOT.

• protostar

• main sequence star

• white dwarf

• planetary nebula

A student learns that the sun is classified as a medium-size star and that many stars are much bigger and brighter. However, the student observes that other stars look very dim, even through a telescope. Why do other stars look much dimmer than the sun?

• The sun appears yellow, which is more visible than other colors.

• The sun is much closer to Earth than other stars are.

• Other stars are made up of different gases than the sun is.

• As light from other stars travels through space, it gets reflected.

A light year is...

• the speed light travels.

• how long it takes light to get to you from the sun.

• the distance light can travel in a year.

• how many years it takes light to be emitted.

This picture depicts the relative sizes of stars. What does the word "depicts" mean?

• verifies

• argues

• proves

• shows

What is the name of the spiral galaxy of stars that contains our Sun?

• Planisphere

• Planetary Nebula

• Solar System

• Milky Way

The spiral shape of the MIlky Way galaxy cannot be seen from Earth because...

• our view is blocked by the Sun
• Earth is located above the galaxy
• Earth is located in one of the spiral arms
• the Milky Way is not a spiral