Our Solar System

How many planets does our solar system has?

• 8

• 9

• 10

• 23

What keeps the planets in their orbits?

• Their rotation movement

• The revolution movement

• The sun's gravity

• The orbit they follow

_____________ is the force that pulls objects toward each other.

• light

• speed

• gravity

• I don't know

A planet's orbit is shaped like an ________.

• circle

• square

• elipse

• triangle

What's a planet?

• A very large, round object that moves around a star.

• A ball of gas

• A ball of ice

• A small ball that moves around its moons

Which dwarf planet was once considered the ninth planet?

• Ceres

• Makemake

• Haumea

• Pluto

What's an asteroid?

• A rocky object that orbits the sun but it is too small to be called a planet

• A frozen object that orbits the sun

What's a comet?

• A rocky object that orbits the sun but it is too small to be called a planet

• A frozen object that orbits the sun

This is the correct order of the planets in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.

• correct

• incorrect

The inner planets are:

• Mars, Earth, Venus and Saturn

• Jupiter, Uranus, Saturn and Neptune

• Uranus, Mars, Neptune and Earth

• Mercury, Venus, Earth and Mars