Worksheet: The Solar System

In this worksheet, we will practice identifying the different bodies that are part of the Solar System.


How many planets are there in our solar system?


True or False: The Moon is a planet.

  • AFalse
  • BTrue


The solar system is full of planets, moons, asteroids, comets, and minor planets, known as dwarf planets. What is an asteroid?

  • AA type of star
  • BA small planet
  • CA small rocky body that orbits the Sun


The table shows the number of moons that the planets in our solar system have.

Planet Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune
Number of Moons 001279622714

Which planet has the most moons?

  • AUranus
  • BSaturn
  • CJupiter

How many moons does Mars have?


Choose the missing word: is the only planet known to have living things on it.

  • AVenus
  • BEarth
  • CUranus
  • DJupiter


Which planet has red soil?

  • AMars
  • BVenus
  • CMercury
  • DNeptune


Finish the sentences to describe the planets in our solar system.

The outer planets are giants.

  • Asmooth
  • Bgas
  • Crocky

The inner planets are planets.

  • Asmooth
  • Bgas
  • Crocky


Choose the missing word: A/an is a small, rocky body orbiting the Sun.

  • Acomet
  • Bstar
  • Cmeteor
  • Dasteroid


The table shows how many moons each planet has and whether the planets have rings.


Which of the planets with rings has the fewest moons?

  • ANeptune
  • BMercury
  • CVenus
  • DJupiter

Which two planets have no moons and no rings?

  • AVenus and Mars
  • BVenus and Earth
  • CEarth and Mars
  • DMercury and Venus


The image shown was taken in space.

Earth, Sun and Moon

The Earth, Sun and Moon are all approximately the same shape. Approximately, what shape are they?

  • ACylinder
  • BCone
  • CRectangular prism
  • DSphere
  • ECircle

Which of the following statements best describes the movement of these bodies in space?

  • AThe Sun orbits the Moon, and the Moon orbits Earth.
  • BEarth orbits the Moon and the Sun.
  • CEarth orbits the Sun, and the Moon orbits Earth.
  • DThe Sun orbits Earth and the Moon.
  • EThe Moon orbits the Sun, and the Sun orbits Earth.


True or False: The Sun is a star.

Sun is a star
  • AFalse
  • BTrue


What is at the center of our solar system?

Sun position in solar system - 72 ppi
  • AThe Moon
  • BThe Sun
  • CEarth
  • DThe Milky Way


The chart shows the eight planets in our solar system. Which planet is missing?

  • AThe Moon
  • BPluto
  • CJupiter
  • DMars


What is a galaxy?

Galaxy-72 ppi
  • AA cloud of dust and gas in outer space
  • BA group of stars that form a recognizable pattern in the sky
  • CThe star around which Earth orbits
  • DA system of billions of stars, together with gas and dust, held together by gravitational attraction


The chart shows the planets in our solar system.

Which planet is closest to the Sun?

  • AVenus
  • BEarth
  • CMercury
  • DMars

Which planet in our solar system is the largest?

  • AThe Sun
  • BJupiter
  • CEarth
  • DUranus


Which planet is third from the Sun?

Earth is the third planet from the sun - 72 ppi
  • AMars
  • BJupiter
  • CEarth
  • DUranus


Which planet is farthest from the Sun?

  • AJupiter
  • BSaturn
  • CUranus
  • DEarth
  • ENeptune


We can see some of the planets in our solar system using a powerful telescope. Scientists also use special machines to orbit planets and collect information.

What is the name of this special machine?

  • AAsteroid
  • BAstronaut
  • CSatellite


What is a comet?

  • AA small solid rock traveling through the atmosphere
  • BA small chunk of dust and ice that orbits, or travels around, the Sun


The Sun is the largest object in the solar system. All the planets in the solar system move around the Sun in a circular path.

What is the name given to this circular movement?

  • ARevolution
  • BAsteroid
  • CEllipse
  • DOrbit


The moon is covered in craters. What is a crater?

Moon with craters
  • AAn opening in the surface of a planet or moon through which lava and gases flow.
  • BA hole in the surface of the moon caused by a collision with a planet.
  • CA hole in the surface of a planet, moon, or asteroid, caused when an object (asteroid, meteoroid, or comet) crashes into it with great force.


The table shows the maximum temperatures in degrees Fahrenheit of the four inner planets.

Maximum Surface Temperature (F)840F870F136F70F

Which of the inner planets is the hottest?

  • AMercury
  • BVenus
  • CMars
  • DEarth

Which of the inner planets is the coldest?

  • AEarth
  • BMercury
  • CMars
  • DVenus


Astronomers often divide the planets in our solar system into two groups: the inner planets and the outer planets.

The inner planets are closer to the Sun and are smaller and rockier. The outer planets are further away, larger, and made up mostly of gas.

Name the four inner planets in order of their distance from the Sun.

  • ANeptune, Uranus, Saturn, Jupiter
  • BJupiter, Saturn, Uranus, Neptune
  • CMercury, Venus, Earth, Mars
  • DMars, Earth, Venus, Mercury

Name the four outer planets in order of their distance from the Sun.

  • AMars, Earth, Venus, Mercury
  • BNeptune, Uranus, Saturn, Jupiter
  • CMercury, Venus, Earth, Mars
  • DJupiter, Saturn, Uranus, Neptune

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