1. Mercury, Venus, Earth, Mars
2. They are closer to the Sun and smaller in size compared to the outer planets.
3. Earth is on one side and Mars is on the other because they are both inner planets orbiting between the Sun and the asteroid belt.
4. A planet is a celestial body that orbits a star, is spherical in shape, and has cleared its orbital path of other debris.
5. Venus is sometimes called Earth’s twin because it is similar in size and mass.
6. Earth has one natural satellite: the Moon.
7. Venus has no moons; Mars has two moons: Phobos and Deimos.
8. Mercury is closest to the Sun and has no moons.
9. Venus rotates in the opposite direction (retrograde rotation) compared to most other planets.
10. Earth is between Venus and Mars.
Parent Tip: Review the logic above to help your child master the concept of the outer planets worksheet answers.
