Solar System

In the heliocentric model, Earth and the other planets revolve around the _.

In the geocentric model, _ is at the center of the revolving planets and the sun.

One astronomical unit (AU) equals the average distance between _ and the sun.

Which planet takes the longest to rotate on its axis?

• Venus

• Mercury

• Earth

• Jupiter

Which inner planet is furthest from the sun?

• Venus

• Earth

• Mercury

• Mars

Which planet has the fastest trip around the sun?

• Mercury

• Mars

• Venus

• Earth

Which planet has the Great Red Spot, a storm larger than Earth?

• Jupiter

• Saturn

• Uranus

• Neptune

Which planet is the ONLY planet less dense than water and would float if put in a large enough ocean?

• Jupiter

• Uranus

• Saturn

• Neptune

Which planet has the greatest gravitational pull?

• Neptune

• Mars

• Uranus

• Jupiter

Which planet revolves around the sun about once in an average human lifetime?

• Saturn

• Uranus

• Neptune

• Jupiter