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Dinosaurs
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The Mesozoic Era



The Mesozoic Era
Reading Level
     edHelper's suggested reading level:   grades 5 to 6
     Flesch-Kincaid grade level:   5.4

Vocabulary
     challenging words:    diversify, evergreen, existence, billion, tyrannosaurus, extinction, lifetime, mass, landmass, history, record, early, exist, although, itself, percent
     content words:    Atlantic Ocean, Himalaya Mountains, United States


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The Mesozoic Era
By Cindy Grigg
  

1     When we talk about time, we have many words to use to talk about different times in our lives. Summers, mornings, months, afternoons, years, and weekends are just a few of them. When you think back over your lifetime, you may remember blocks of time like the summer you were five or your second grade school year.
 
2     When scientists talk about time, they need words to name the exact time they are talking about, too. Earth was formed about 4.6 billion years ago. That's the same as 4,600 million years. That's a very big chunk of time! So, those millions of years have been divided up into large chunks that have something in common. Then names have been given to each large chunk of Earth's history.
 
3     The first dinosaurs lived about 225 million years ago. This was in the Mesozoic era, also called the Age of Dinosaurs. The Mesozoic is divided into smaller chunks of time.

Paragraphs 4 to 6:
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Dinosaurs
             Dinosaurs


Earth
             Earth


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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