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Worksheets and No Prep Teaching Resources
Reading Comprehension Worksheets
Water Cycle
Earth Science
System Earth, Part 2

Water Cycle
Water Cycle


System Earth, Part 2
Print System Earth, Part 2 Reading Comprehension


Reading Level
     edHelper's suggested reading level:   grades 8 to 10
     Flesch-Kincaid grade level:   10.14

Vocabulary
     challenging words:    nitrogen-fixing, phosphorous, regeneration, reenters, geosphere, thermodynamics, measurable, subtraction, methane, radioactive, organic, atmospheric, extremely, radiation, portion, solar
     content words:    System Earth


System Earth, Part 2
By Trista L. Pollard
  

1     In the article System Earth, Part 1, you found out that our planet was a system made up of smaller systems that were vital to our planet's survival. Within our four spheres, there are cycles or continuous processes that provide essential resources and nutrients for Earth. Earth is an open system because energy and matter are transferred through all four spheres within these cycles. In this article, we will explore the energy sources for the systems and cycles on our planet and the actual cycles that provide the nutrients that living organisms need to survive on our planet.
 
2     Scientists have found that the flow of energy on Earth is not only measurable but also predictable. In fact, there are scientific laws that explain the way energy is exchanged and transferred on our planet. The first law of thermodynamics explains that energy is transferred between systems, but it cannot be created or destroyed. As you know, energy is transferred between the four spheres on Earth. Scientists refer to these transfers of energy as an energy budget. Just like your parents' household budget where you have subtractions and additions of money, addition of energy within our environment is balanced by subtraction of energy from our environment. A good example would be solar energy. Energy from the sun is absorbed and reflected in equal amounts. However, we cannot create solar energy on Earth.
 
3     The second law of thermodynamics states that when energy transfer occurs, matter becomes less organized with time. In laymen's terms, the energy in our universe and on our planet is spread out more uniformly over time. Keep in mind that the four spheres on our planet are open systems. These spheres are also reservoirs for energy and matter. Although we cannot see it, matter and energy are constantly exchanged between the spheres through different processes. These processes are in the form of chemical reactions, radioactive decay, the radiation of energy, and the growth and decay of organisms. This is where the cycles in our earth system become extremely important.

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Water Cycle
             Water Cycle


Earth Science
             Earth Science


More Lessons
             High School Reading Comprehensions and High School Reading Lessons


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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