Lesson 3 | The Outer Planets
Name Date Class
LESSON 3
The Outer Planets
Directions: In this word search puzzle, find and circle the five terms listed below. Then on each line, write the
term that correctly completes each sentence.
Galilean moons orbit probe rotation Titan
1. Io, Europa, Ganymede, and Callisto are called the .
2. Saturn’s largest moon, , is bigger than the planet Mercury.
3. Like Jupiter, Saturn has a rapid and horizontal bands
of clouds.
4. Jupiter takes almost 12 years to complete one .
5. Scientists use a to examine planets and moons in the solar
system.
The Solar System 45
Name Date Class
LESSON 3
The Outer Planets
Key Concept What are the outer planets made of?
Directions: Answer each question by writing the correct outer planet or planets on the lines provided.
|Jupiter |Neptune |Saturn |Uranus |
1. Which planets have a small amount of methane in their atmospheres?
2. Which planets have atmospheres composed of hydrogen and helium gases?
3. Which planet has an atmosphere of 90 percent hydrogen?
4. Which planets have rings?
5. Which planet has a tilted axis of rotation?
6. Which planet’s interior is most like the one on Uranus?
7. Which planet has the largest and most complex ring system?
8. Which planets have interiors made of partially frozen water and ammonia?
9. Which planet’s surface is a thick, slushy layer of water, ammonia, and other materials?
10. Which planet takes 165 years to orbit the Sun?
11. Which planet has a core that might be the size of Earth and ten times its mass?
12. Which planet has rings, each containing thousands of narrower ringlets?
13. Which outer planets have periods of rotation that are shorter than Earth’s?
58 The Solar System
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Key Concept Builder
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