Which planet is the biggest based on diameter?

• Neptune

• Saturn

• Jupiter

• Uranus

Which planet is the smallest based on diameter?

• Earth

• Mercury

• Mars

• Venus

Which planet is closest to the sun?

• Venus

• Mars

• Earth

• Mercury

Which planet is the farthest from the sun?

• Saturn

• Neptune

• Uranus

• Jupiter

Which planet has about the same diameter as Earth?

• Mars

• Venus

• Mercury

• Uranus

What is a central star with a group of space objects orbiting it?

• scale model

• planet

• solar system

• astronomy

What is the study of the moon, stars, and other objects in space?

• scale model

• diameter

• solar system

• astronomy

What is a big round mass of gas or rock that moves around the Sun?

• planet

• diameter

• solar system

• scale model

What is a physical representation of an object or concept?

• astronomy

• diameter

• solar system

• scale model

What is a straight line going through the center of a circle connecting two points?

• astronomy

• diameter

• solar system

• scale model