ES Unit 6: 27.3/27.4 Planets

The orbital period of the inner planets is significantly _________ than the orbital period of the outer planets.

• shorter

• longer

• more elliptical

• less elliptical

Why is the orbital period of the outer planets longer than that of the inner planets?

• The outer planets are larger so the move slower.

• The inner planets are larger so they move slower.

• The outer planets are further away from the Sun so have longer orbital paths.

• The inner planets are closer to the Sun so have longer orbital paths.

The asteroid belt is

• a ring of celestial debris that orbits the planets.

• a ring of asteroids that extend between 299 million to 598 million km from the sun.

• a collection of satellites that is bound by Earth's gravity.

• a doughnut-shaped ring of icy objects around extending just beyond the orbit of Neptune from about 30 to 55 AU.

The asteroid belt is located

• outside of our solar system but within the Milky Way Galaxy.

• in our solar system just beyond Jupiter.

• just outside of our solar system beyond Pluto.

• in our solar system between the terrestrial planet Mars and the jovian planet Jupiter.

The Sun rises in the west and sets in the east on what terrestrial planet?

• Venus

• Mercury

• Saturn

• Earth

Large oceans of liquid water exist on what planet?

• Mars

• Earth

• Mercury

• Jupiter

Which planet is called Earth's twin with a diameter almost the same as Earth?

• Venus

• Mars

• Mercury

• Neptune

Olympus Mons is the largest volcano in the solar system located on what planet?

• Mercury

• Venus

• Uranus

• Mars

On what planet is a year shorter than a day?

• Mercury

• Venus

• Uranus

• Jupiter

Plate tectonics are known to exist on what planet?

• Earth

• Mars

• Saturn

• Mercury