Planets Review

What is the term for an imaginary line around which a planet rotates?

• Equator

• Axis

• Diameter

• Orbit

Which planet is known as the Red Planet?

• Venus

• Mars

• Jupiter

• Saturn

What "separates" the inner and outer planets?

• Asteroid belt

• Kuiper belt

• Oort cloud

• Galactic core

What are the four inner planets in our solar system?

• Mercury, Venus, Earth, Mars

• Jupiter, Saturn, Uranus, Neptune

• Earth, Mars, Jupiter, Saturn

• Mercury, Venus, Earth, Jupiter

Which planet has extreme temperature changes and little atmosphere?

• Venus

• Mars

• Mercury

• Jupiter

What is the star at the center of the solar system that is the primary source of energy for Earth?

• Moon

• Earth

• Sun

• Mars

Which planet is known as the Earth's twin because of its similar size and composition?

• Mars

• Venus

• Jupiter

• Mercury

What is the order of the planets?

• Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

• Earth, Mars, Venus, Mercury, Jupiter, Saturn, Neptune, Uranus

• Jupiter, Saturn, Uranus, Neptune, Earth, Mars, Venus, Mercury

• Venus, Earth, Mars, Jupiter, Saturn, Mercury, Uranus, Neptune

What is the second planet from the sun that is rocky and similar in size to Earth?

• Mars

• Venus

• Jupiter

• Mercury

This planet takes much longer to make a complete spin on its axis than orbit the sun.

• Mars

• Venus

• Jupiter

• Saturn