Universe

The explosion that sent the universe flying out is called _____.

• The Big Bang

• The Milky Way

• The Solar System

• The Sun

Since the Big Bang, and even today, the universe is still _____.

• Expanding

• Shrinking

• Cooking

• Spinning

Most scientists believe the Big Bang Theory explains which of the following questions?

• How our planets and moons formed

• How our universe began

• How the sun turns hydrogen into helium

• How fast light travels through space

Which statement is true?

• The galaxies are moving toward us.

• The galaxies are moving away from us.

• The universe remains static or unchanged in motion.

• None of the above

Space and all the matter and energy in it.

• Space

• Solar System

• Universe

• Sun

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

• Universe

• Galaxy

• Star

• Solar System

A relatively large spherical body that orbits a star.

• Star

• Planet

• Moon

A large celestial body that is composed of gas and that emits light.

• star

• black hole

• element

• big bang

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

• Nebula

• Galaxy

• Universe

• Protostar

For how long has the Voyager 1 space probe traveled from Earth?

• Over 30 years

• 69 years

• Over 40 years

• 420 years