Overview of the Planets of Our Solar System

The solar system consists of eight planets orbiting the Sun. The inner planets, Mercury, Venus, Earth, and Mars, are small and dense with solid surfaces and metallic cores, while the outer planets, Jupiter, Saturn, Uranus, and Neptune, are large gas giants. An asteroid belt separates the inner and outer planets. Inner planets have tectonic activities and atmospheres, whereas outer planets are mostly gaseous.

How many planets are there in our solar system?

• Eight

• Ten

• Nine

• Seven

Which of the following is NOT an inner planet?

• Mars

• Jupiter

• Venus

• Mercury

What are the inner planets primarily made of?

• Water

• Nickel and Iron

• Ice

• Gases

What separates the inner planets from the outer planets?

• A ring of fire

• An asteroid belt

• A comet belt

• A magnetic field

Why are the outer planets referred to as gas giants?

• They are close to the Sun

• They are very small

• They have solid surfaces

• They are made mostly of gases