Unit 9 Test

Which characteristic do all the inner planets share?

• They all have moons

• They are all gaseous

• They are all solid and rocky

• They are all larger than Earth.

Which list gives the correct order of the outer planets, starting with the planet closest to the sun?

• Jupiter, Saturn, Neptune, Uranus

• Saturn, Jupiter, Uranus, Neptune

• Jupiter, Saturn, Uranus, Neptune

• Saturn, Jupiter, Neptune, Uranus

Where in the universe does gravity act?

• nowhere

• everywhere

• only on earth

• only between the sun and planets

Which one of the following objects in our solar system would travel the greatest distance during one revolution around the sun?

• an inner planet

• a gas giant

• a comet

• an asteroid

Which is the largest planet?

• Mars

• Uranus

• Jupiter

• Saturn

Which of these is NOT one of the inner planets?

• Earth

• Venus

• Uranus

• Mercury

The force that holds the planets in orbit around the sun is called ________.

• gravity

• motion

• friction

• pressure

Which of the following is a wide region of small, rocky bodies that is located between the orbits of Mars and Jupiter?

• the Kuiper belt

• the asteroid belt

• the Oort cloud

• the rings of Saturn

How are Jupiter, Saturn, and Uranus similar?

• They are all planets made of gases.

• They are all the same size.

• They are all the same distance from the sun.

• They all have the same surface temperature.

Which of the following statements about Earth is true?

• It is the only planet in the solar system with a moon.

• It is the only planet in the solar system that rotates on an axis.

• It is the only planet in the solar system known to support life.

• It is the only planet in the solar system with an atmosphere.