Planets and Celestial Objects

The sun gets its energy from nuclear fusion in its core.

• True

• False

Meteors are bits of asteroids that are floating aimlessly around in space.

• True

• False

Meteoroids usually come from comets or asteroids.

• True

• False

The sun is considered a super-giant star.

• True

• False

A star's apparent brightness is its brightness as seen from Earth.

• True

• False

Scientists believe that the moon has been hit by numerous meteoroids because they can see that it has many

• maria

• rocks

• valleys

• craters

In a geocentric system,

• all of the planets revolve around the sun.

• the sun revolves around the Earth.

• Earth is the center of the universe.

• the sun appears to move backward among the planets.

A streak of light made by a chunk of rock or dust entering Earth's atmosphere is called a(n)

• asteroid

• meteor

• meteoroid

• meteorite

The four terrestrial planets all have

• hot temperatures

• rocky surfaces

• deep atmosphere

• large size

The __________ is located between the orbits of Mars and Jupiter.

• Oort Cloud

• Asteroid belt

• Kuiper belt

• Milky Way Galaxy