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Matter
Mixtures, Solutions, and Compounds

Matter
Matter


Mixtures, Solutions, and Compounds
Reading Level
     edHelper's suggested reading level:   grades 7 to 8
     Flesch-Kincaid grade level:   7.71

Vocabulary
     challenging words:    cereala, friesthe, glassful, saladthe, shovelful, proportion, pipes, french, chloride, compounds, paragraph, element, mercury, formula, solution, sift


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Mixtures, Solutions, and Compounds
By Sharon Fabian
  

1     You have probably already heard of elements. Elements are the basic materials that everything on Earth is made of, and there are just over one hundred of them. Some of our everyday things are elements. There are copper pipes and wiring, aluminum foil, and helium inside balloons. But most of the things we see each day are not just one element; most of them are combinations. The three main kinds of combinations are mixtures, solutions, and compounds.
 
2     Soil is a mixture. A shovelful of soil might contain some top soil, some clay, maybe a little sand, a few bugs, maybe some really tiny microorganisms, maybe a worm, maybe some rotting plant roots, and maybe some more things. Soil is a mixture. Each shovelful of soil is probably a little different from the next one. Maybe one has more sand, and the other has more clay. Maybe one shovelful has two worms! Soil can be separated into its different parts. You can take the worm and the bugs out. You can sift out the sand, or scoop out the clay. These are some characteristics of a mixture: a mixture is not the same from one sample to the next, and a mixture can be separated into its parts.
 
3     Salt water is a solution. A glassful of salt water contains both salt and water. The salt is dissolved evenly throughout the water, so that one spoonful of the salt water would contain the same amounts of salt and water as another spoonful of the salt water. Salt water can be separated into its parts. You can let the water evaporate, and you will have just the salt left. Salt water is a solution because it has these two characteristics: it has the same concentration of each of its parts throughout the solution, and it can be separated by some physical process.

Paragraphs 4 to 7:
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Matter
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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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