Neptune Reading Comprehension Neptunereadingcomp
User Manual: Neptune
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Neptune Reading Comprehension Worksheet
Item 3017
www.tlsbooks.com 
Neptune 
Neptune, named after the Roman god of the sea, is 
a large gas planet and is the eighth, and farthest, 
planet from the Sun. Scientists believe the 
atmosphere of Neptune is made up of hydrogen, 
helium, silicates, and water. Neptune is surrounded 
by clouds moving up to 700 mph. Some of the clouds 
are composed mostly of frozen methane, giving 
Neptune its blue color. 
Neptune rotates on its axis in 16.11 hours and takes 
164.69 Earth years to orbit the Sun.  
Neptune has thirteen natural satellites (moons) and six rings. The rings of Neptune consist 
mostly of dust.  Triton is Neptune’s largest moon and orbits the planet in a direction 
opposite to Neptune’s other moons. Triton orbits Neptune once every six days. Triton 
was the last solid object visited by NASA's Voyager 2 spacecraft as it made its way 
toward the edge of our solar system. 
After reading the information above, fold your paper on the line and try to answer the 
questions below without referring back to the data. (Check the box with the correct answer.) 
1. The rings of Neptune consist mostly of ___________________?
 water            ice            dust
2. How many moons does Neptune have?
 thirteen             thirty             thirty-six 
3. How frequently does Triton orbit Neptune?
 every 16 hours             every 6 days           every 164 years         
4. Which gas do scientists believe contributes to Neptune’s blue color?
 methane             hydrogen             helium
5. Neptune is surrounded by fast moving ________________________.
 spacecraft            debris             clouds
Image courtesy of http://solarsystem.nasa.gov 
Copyright ©2010 T. Smith Publishing. All rights reserved.

Neptune Reading Comprehension Worksheet Answer Key
Item 3017
www.tlsbooks.com
Neptune 
Neptune, named after the Roman god of the sea, is 
a large gas planet and is the eighth, and farthest, 
planet from the Sun. Scientists believe the 
atmosphere of Neptune is made up of hydrogen, 
helium, silicates, and water. Neptune is surrounded 
by clouds moving up to 700 mph. Some of the clouds 
are composed mostly of frozen methane, giving 
Neptune its blue color. 
Neptune rotates on its axis in 16.11 hours and takes 
164.69 Earth years to orbit the Sun.  
Neptune has thirteen natural satellites (moons) and six rings. The rings of Neptune consist 
mostly of dust.  Triton is Neptune’s largest moon and orbits the planet in a direction 
opposite to Neptune’s other moons. Triton orbits Neptune once every six days. Triton 
was the last solid object visited by NASA's Voyager 2 spacecraft as it made its way 
toward the edge of our solar system. 
After reading the information above, fold your paper on the line and try to answer the 
questions below without referring back to the data. (Check the box with the correct answer.) 
1. The rings of Neptune consist mostly of ___________________?
 water            ice           ; dust
2. How many moons does Neptune have?
; thirteen             thirty             thirty-six 
3. How frequently does Triton orbit Neptune?
 every 16 hours            ; every 6 days           every 164 years         
4. Which gas do scientist believe contributes to Neptune’s  blue color?
; methane             hydrogen             helium
5. Neptune is surrounded by fast moving ________________________.
 spacecraft            debris            ; clouds
Image courtesy of http://solarsystem.nasa.gov 
Copyright ©2010 T. Smith Publishing. All rights reserved.