What is the solar system?
The Sun and everything that orbits it, planets and moons.
What is a planet?
A sphere that moves around the Sun.
Which are the rocky planets?
Mercury, Venus, Earth and Mars
Which is the smallest planet of the solar system?
Mercury
Which are the gas planets?
Jupiter, Saturn, Urano and Neptune
Which is the hottest planet?
Venus
Which the red planet?
Mars
Why is Earth different?
Because it is the only planet that has liquid water and living things.
