(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

Fill in the blanks below with words from this box:

Neptune

solar

asteroids

orbit

dinosaurs

Mercury

gas giants

Mars

Jupiter

water

Earth

Pluto

nine

temperature

Saturn

Venus

planetoids

comets

terrestrial

Uranus

tail

The Solar System

The _______________ system is the group of planets that _____________ our Sun. There are _________________ known planets in our solar system, but some observers think they have spotted others beyond the orbit of _______________.

The Terrestrial Planets

Mercury, Venus, Earth, and Mars are called _________________ planets because they have rocky surfaces. _______________, of course, is the planet we live on.  _______________ is the closest planet to the sun.  ________________, which is also called the evening star, has a ______________ of 500 degrees Celsius and clouds of sulfuric acid.  _________________ is known as the red planet. Recently, frozen ______________ was discovered there.

The Gaseous Planets

Jupiter, Saturn, Uranus, and Neptune are called __________________ because they are big and made mostly of gas. _______________ is the largest planet in the solar system. _________________ is famous for its rings.

_______________ also has rings but is not as famous as Saturn. _____________ is named after the god of the sea.

Planetoids: Asteroids and Comets

There are many other ______________ in the solar system. Between Mars and Jupiter there is a belt of small rocky objects called _______________. As well, balls of ice and rock called _______________ occasionally come close to the sun creating a bright ________________ that can be seen from Earth. Some scientists think the _____________ became extinct when one of these comets came crashing into the Earth.

Fill in the blanks below with words from this box:

Neptune

solar

asteroids

orbit

dinosaurs

Mercury

gas giants

Mars

Jupiter

water

Earth

astronomers

Pluto

eight

temperature

Saturn

Venus

planetoids

comets

terrestrial

Uranus

tail

The Solar System

The _______________ system is the group of planets that _____________ our Sun. There are _________________ known planets in our solar system. We used to say there were nine planets, but now _________________ think that ______________ is too small to be called as a planet.

The Terrestrial Planets

Mercury, Venus, Earth, and Mars are called _________________ planets because they have rocky surfaces. _______________, of course, is the planet we live on.  _______________ is the closest planet to the sun.  ________________, which is also called the evening star, has a ______________ of 500 degrees Celsius and clouds of sulfuric acid.  _________________ is known as the red planet. Recently, frozen ______________ was discovered there.

The Gaseous Planets

Jupiter, Saturn, Uranus, and Neptune are called __________________ because they are big and made mostly of gas. _______________ is the largest planet in the solar system. _________________ is famous for its rings.

_______________ also has rings but is not as famous as Saturn. _____________ is named after the god of the sea.

Planetoids: Asteroids and Comets

There are many other ______________ in the solar system. Between Mars and Jupiter there is a belt of small rocky objects called _______________. As well, balls of ice and rock called _______________ occasionally come close to the sun creating a bright ________________ that can be seen from Earth. Some scientists think the _____________ became extinct when one of these comets came crashing into the Earth.

Across

2. Earth's companion.

4. The farthest planet from the sun.

5. An instrument that scientists use to observe planets.

9. This planet is known as the red planet.

11. One of many 'rocks' in a belt between Mars and Jupiter.

12. Planet between Saturn and Neptune.

14. The largest planet in the solar system.

15. Planet named after the sea god.

Down

1. Planet known as the evening star.

2. Our galaxy.

3. An icy rock that has bright tail when it comes close to the sun.

6. Our sun is this.

7. The path that a planet takes around the sun.

8. Planet closest to the sun.

10. Planet famous for its rings.

13. Star at the center of our solar system.

16. Our planet.

Across

1. The kind of planet that Earth and Mars are.

6. Star at the center of our solar system.

9. This planet is known as the red planet.

10. A hole in the ground caused by a meteor hitting a planet.

13. An outer layer of gas on a terrestrial planet.

15. Planet between Saturn and Neptune.

17. Planets like Jupiter, Saturn, Uranus, and Neptune.

20. A rock that crashes into Earth's atmosphere.

21. The largest planet in the solar system.

Down

2. Something that both Saturn and Uranus have.

3. Our planet.

4. An instrument that scientists use to observe planets.

5. Our galaxy.

6. Our sun is this.

7. The farthest planet from the sun.

8. Planet closest to the sun.

11. Planet named after the sea god.

12. Planet known as the evening star.

14. The path that a planet takes around the sun.

16. One of many 'rocks' in a belt between Mars and Jupiter.

17. The force that holds planets in their orbits.

18. Planet famous for its rings.

19. An icy rock that has bright tail when it comes close to the sun.

20. Earth's companion.