The Solar System

How many planets are there in the solar system?

• 6

• 8

• 9

• 14

Which is NOT part of our solar system? 

• the moons around Jupiter

• asteroids and meteoroids

• comets

• stars that are not the Sun

The ____  are the four planets closest to the Sun

• outer planets

• gas giants

• inner planets

• larger

The inner planets rotate _____  than the outer planets.

• more slowly

• more quickly

• more frequent

• less frequent

Which two planets do not have moons?

• Mercury and Mars

• Mercury and Neptune

• Mercury and Venus

• Venus and Mars

Some of the dwarf planets in our solar system are:

• Makemake, Ceres and Charon

• Pluto, Pallas and Eris

• Eris, Pluto and Nix

• Haumea, Pluto and Eris

The moons are made up of:

• rock or ice

• rock or gas

• rock or metals

• ice or gas

Tags

NGSS.MS-PS1-1

The outer planets are ____  than the inner planets, 

• smallest

• larger

• slower

• rocky

Tags

NGSS.MS-ESS1-3

The outer planets are also called ________.

• terrestrial planets

• larger planets

• gas giants

• farthest planets

The outer planets have thick atmospheres of ____ and ______.

• oxygen and helium

• carbon dioxide and helium

• hydrogen and nitrogen

• Hydrogen and helium

Tags

NGSS.MS-PS1-1