Quiz on Planets and the Solar System

What are the two SMALLEST planets in our solar system?

• Mercury and Mars

• Mars and Earth

• Mercury and Venus

• Venus and Earth

Which planet is MOST like Earth in size?

• Saturn

• Mars

• Venus

• Mercury

Which of these is NOT a characteristic of terrestrial planets?

• These planets are the closest to the Sun of all planets in our solar system.

• These planets are made of rock and iron.

• These planets are relatively small and closer together in space.

• These four planets are the largest of all planets in our solar system.

How are the inner planets different from the outer planets?

• The inner planets are further away from the Sun.

• The inner planets do not have many moons.

• The outer planets have many moons.

• The outer planets are called the ‘gas giants’.

How are the outer planets different from the inner planets?

• They are much smaller than the inner planets.

• They all have thick atmospheres made up of gasses.

• Their orbit around the Sun takes less time than the inner planets.

• They all have surfaces that are solid.

Which statement BEST describes our Galaxy?

• The inner and outer planets, moons, asteroids, gas and dust that orbit our star, the Sun.

• Our star, the Sun orbits around the planets, moons, asteroids, gas and dust.

• Billions of stars, dust, gas, planets, moons, asteroids, and comets that spin out from the center.

• Billions of stars, dust, gas, planets, moons, asteroids, and comets that orbit our Galaxy.

Explain the difference between our solar system and the Milky Way galaxy.

• Our solar system is a part of the Milky Way galaxy, which contains billions of stars.

• The Milky Way galaxy is a part of our solar system, which contains only one star.

• Our solar system contains billions of stars, while the Milky Way galaxy contains only one.

• The Milky Way galaxy and our solar system are the same, with no differences.

What is a galaxy made up of?

• Only stars

• Stars, planets, and moons

• Stars, planets, moons, asteroids, meteoroids, comets, gases, and dust

• Just dust and gases

What is the main difference between a galaxy and a solar system?

• A galaxy is smaller than a solar system

• A solar system has more stars than a galaxy

• A galaxy contains many solar systems

• A solar system contains many galaxies

What is the primary star in our solar system?

• Alpha Centauri

• The Moon

• The Sun

• Polaris