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Chapter 20: Respiration and Excretion
Internet Connection
Lung Cancer
Visit this site to learn more about lung cancer. What is the major cause of cancer mortality in the U.S. and how can it be prevented?

Internet Connection
Kidneys
Follow the link to this site to learn more about how kidneys work. In your Science Journal, sketch a diagram of a kidney. Label the nephron and ureter and list the function of each.

 

Unit 6: Interactions in the Living World
Internet ConnectionNational Geographic

The Particle Adventure
Visit this site for an interactive tour of the atom. View the movie and click on the link for an introduction to the fundamental particles and forces. How have scientists’ views of the fundamentals changed over time?

Virtual Chloroplast
Click on the links and follow the instructions to explore the organization of the plant chloroplast. View the movie that shows light absorption.

DNA Structure Movie
At this site you’ll find a movie about the structure of DNA. View the movie, then sketch a diagram of a DNA molecule in your Science Journal.

The Gene Letter
Find out more about how genetic disorders occur by accessing this article. In the case of X-linked recessive disorders, why don’t the sons of affected fathers also have the disorders?

 
 
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Science Voyages Level Green Grade 7 Science Voyages Level Green