Which planets are considered the inner planets?

• Jupiter, Saturn, Uranus, Neptune

• Mercury, Venus, Earth, Mars

• Earth, Mars, Jupiter, Saturn

• Venus, Earth, Neptune, Pluto

What are inner planets also called?

• Gas giants

• Ice planets

• Terrestrial planets

• Dwarf planets

What are the inner planets mostly made of?

• Gas and ice

• Rock and metal

• Water and air

• Dust and gas

Why are the inner planets denser than the outer planets?

• They are made of lighter elements

• They are made of heavier elements like iron and nickel

• They are closer to the asteroid belt

• They have more rings

What is the asteroid belt?

• A ring of rocks and dust between Mars and Jupiter

• A collection of comets near the Sun

• A group of stars in the Milky Way

• A cloud of gas around Earth

Which inner planet is closest to the Sun?

• Venus

• Earth

• Mars

• Mercury

Which inner planet has a thick atmosphere of carbon dioxide?

• Mars

• Earth

• Venus

• Mercury

Which inner planet is known for having liquid water?

• Mars

• Earth

• Venus

• Mercury

What is unique about Mars compared to other inner planets?

• It has a thick atmosphere

• It is a cold, dry planet with a thin atmosphere

• It is the largest inner planet

• It has the most rings

How have scientists learned about the inner planets?

• By observing them with telescopes

• By sending spacecraft to study them

• By studying meteorites

• By listening to radio signals