10 The Universe

The sun and all of the planets and other bodies that travel around it:

• Universe

• Galaxy

• Star

• Solar System

• I don't know, and that's okay!

A relatively large sphere that orbits a star:

• Star

• Planet

• Moon

• I don't know, and that's okay!

A large body in the sky that is made of gas and gives out its own light:

• star

• black hole

• moon

• Big Bang

• I don't know, and that's okay!

Where in the Milky Way is Earth found?

• Our Sun is in the middle of the galaxy

• about 1 light year from the middle of the galaxy

• It varies depending on how it rotates

• Near the outer edge of the galaxy

• I don't know, and that's okay!

The shape of our Milky Way galaxy can be classified as ____________.

• Spiral

• Elliptical

• Irregular

• I don't know, and that's okay!

A collection of stars, dust, and gas bound together by gravity:

• nebula

• galaxy

• universe

• protostar

• I don't know, and that's okay!

A large cloud of gas and dust in interstellar space; a region where stars are born:

• protostar

• nebula

• galaxy

• black hole

• I don't know, and that's okay!

Space and all the matter and energy in it:

• clusters

• universe

• voids

• constellation

• I don't know, and that's okay!

The distance that light travels in one year; about 9.46 trillion kilometers:

• light-year

• light-kilometer

• warp-year

• warp-kilometre

• I don't know, and that's okay!

Light-years are a measure of:

• time

• speed

• distance

• light

• I don't know, and that's okay!