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Guide to Seasonal Affective Disorder
This site give information on SAD, effects it has on people, and what causes it.
Frostburg State University
General Chemistry Online: Ten Signs of Chemical Change
Resource provides the ten signs that tell when a chemical change has occured. Each sign has a detailed explanation.
Texas A&M University
Texas A&m University: Photosynthesis
Page provides background on photosynthetic process as well as factors affecting photosynthesis (page 24).
NASA
Nasa: Space Place: What Is Infrared?
See images and read about examples of infrared rays, and learn how they behave in different conditions.
Read Works
Read Works: Electromagnetic Radiation
[Free Registration/Login Required] An informational text about electromagnetic radiation and the effects it creates. A question sheet is available to help students build skills in reading comprehension.
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