Outer Planet Fill in | PDF - Free Printable

Here are the answers to the questions on the worksheet, based on the characteristics of Jupiter, Saturn, Uranus, and Neptune.

1. Uranus and Neptune
(Both of these "ice giants" have methane in their atmospheres, which gives them their blue color.)

2. Jupiter and Saturn
(These two gas giants are made up mostly of hydrogen and helium, similar to the Sun.)

3. Jupiter
(Jupiter’s atmosphere is roughly 90% hydrogen and 10% helium.)

4. Jupiter, Saturn, Uranus, and Neptune
(All four of the outer planets have ring systems, though Saturn's are the most visible.)

5. Uranus
(Uranus is unique because it spins on its side, with a tilt of about 98 degrees.)

6. Neptune
(Neptune and Uranus are very similar in size, mass, and interior composition, often called "twins.")

7. Saturn
(Saturn has the most spectacular, largest, and complex ring system in our solar system.)

8. Uranus and Neptune
(Their interiors contain a thick fluid of water, ammonia, and methane ices, unlike the metallic hydrogen inside Jupiter and Saturn.)

9. Uranus
(This description refers to the mantle layer of the ice giants, but it is most commonly associated with Uranus in this context due to its extreme tilt and slushy interior makeup.)

10. Neptune
(Neptune is the farthest planet from the Sun and takes approximately 165 Earth years to complete one orbit.)

11. Jupiter
(Scientists believe Jupiter has a dense core that could be 10 to 20 times the mass of Earth, though it is compressed into a smaller size.)

12. Saturn
(Saturn's rings look solid from a distance, but they are actually made of thousands of narrow ringlets composed of ice and rock.)