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Solar System
Pluto - Not a Planet Anymore

Solar System
Solar System


Pluto - Not a Planet Anymore
Print Pluto - Not a Planet Anymore Reading Comprehension with Fifth Grade Work

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Print Pluto - Not a Planet Anymore Reading Comprehension


Reading Level
     edHelper's suggested reading level:   grades 5 to 8
     Flesch-Kincaid grade level:   6.54

Vocabulary
     challenging words:    non-circular, rock-like, second-largest, trans-Neptunian, third-largest, circular, renamed, science, fourth-largest, orbit, comet, highly, definition, contrast, gravity, discover
     content words:    International Astronomical Union, Kuiper Belt


Pluto - Not a Planet Anymore
By Cindy Grigg
  

1     Science changes as we learn more and more new things. Pluto was discovered in 1930. At that time, there wasn't really a definition for what a planet was. We didn't know as much about space as we do now. In the summer of 2006, scientists of the IAU, or the International Astronomical Union, met to discuss the naming of new objects in the solar system. At this time, the members agreed to remove Pluto from the list of planets. It is now known as a "dwarf planet." A dwarf planet is not a planet. Here are the reasons why.
 
2     There are three main things that make Pluto different from the other planets in our solar system. First, Pluto is less than half the size of any other planet. It is very different from the other gas giants, the nearest planets to it. The first four planets (Mercury, Venus, Earth, and Mars) are rocky planets with solid surfaces. The next four planets are gas giants. Jupiter, Saturn, Uranus, and Neptune are huge planets with small rocky, metal cores surrounded by huge balls of gas. These four planets do not have a solid surface. Saturn is the second-largest planet. Uranus is the third-largest. Neptune is the fourth-largest planet. Then comes little Pluto. It is about one-sixth the size of Earth and about 1/100 the size of Jupiter. It is made of rock and ice. Pluto is like a comet, not a gas giant.

Paragraphs 3 to 4:
For the complete story with questions: click here for printable



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Solar System
             Solar System


Science
             Science


    Careers in Science  
 
    Caring for Earth  
 
    Clouds  
 
    Dinosaurs  
 
    Earth's Land  
 
    Earth  
 
    Earthquakes  
 
    Electricity  
 
    Energy  
 
    Erosion  
 
    Food Pyramid  
 
    Food Webs and Food Chain  
 
    Forces and Motion  
 
    Fossils  
 
    Health and Nutrition  
 
    How Things Work  
 
    Landforms  
 
    Life Science  
 
    Light  
 
    Magnets  
 
    Matter  
 
 
    Moon  
 
    Natural Disasters  
 
    Photosynthesis  
 
    Plant and Animal Cells  
 
    Plants  
 
    Rocks and Minerals  
 
    Science Process Skills  
 
    Scientific Notation  
 
    Seasons  
 
    Simple Machines  
 
    Soil  
 
    Solar System  
 
    Sound  
 
    Space and Stars  
 
    Sun  
 
    Tsunami  
 
    Volcanoes  
 
    Water Cycle  
 
    Water  
 
    Weather  
 



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