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The Solar System

The solar system is made up a star - the sun - eight planets and their moons, and other objects that move around the sun including asteroids, comets, ice, and dwarf planets. The sun is the center of our solar system. All of the objects in the solar system orbit the sun.

Multiple Choice

What is the center of our Solar System?

• Earth

• the moon

• the sun

Multiple Select

All of the objects in our Solar System orbit the sun.

• True

• False

Multiple Choice

How many planets are in our Solar System?

• 7

• 8

• 9

Planet's Order

Nearest the sun are four fairly small, rocky planets known as the inner planets: Mercury, Venus, Earth and Mars.

On the far side of the asteroid belt are four gas giants, known as the outer planets: Jupiter, Saturn, Uranus, and Neptune.

Multiple Choice

The inner planets (Mercury, Venus, Earth, and Mars) are made of--

• rocks

• gas

• helium

Multiple Choice

The outer planets (Jupiter, Saturn, Uranus, Neptune) are made of --

• gas

• rocks

• water

Easy way to remember planets in order from the Sun:

My very educated mother just served us nachos

My=Mercury

Very=Venus

Educated=Earth

Mother=Mars

Just=Jupiter

Served=Saturn

Us=Uranus

Nachos=Neptune

Multiple Choice

In the mnemonic, what planet is associated with nachos?

• Mercury

• Neptune

• Mars

Multiple Choice

In the mnemonic, what planet is associated with My?

• Mars

• Mercury

• Venus

Multiple Choice

What is the third planet from the Sun?

• Mercury

• Venus

• Earth