Thursday, May 10, 2007
Activity 1
SCAVENGER HUNT
Scavenger Hunt Questions:
1. What are electrons?
2. What is a cathode ray tube?
3. Why did Thomson concluded that the cathode rays are negatively charge?
4. Describe and illustrate Sir Joseph John Thomson’s model of an atom
Search Engine: http://www.yahoo.com
Keyword(s) or Phrases used to conduct search:
1. Atom
2.Charge particles
3. Sir Joseph John Thomson
4. Cathode rays
5. Atom Model
Address and brief description of site visited:
1. URL: http://en.wikipedia.org/wiki/Electron
Description:
This site gives information on electron’s charge and mass. It also discusses about the discovery of the electron.
2. URL: http://en.wikipedia.org/wiki/Joseph_John_Thomson
Description:
This site provides a short biography of J.J. Thomson and his work on cathode rays.
3. URL: http://en.wikipedia.org/wiki/Plum_pudding_model
Description:
This site discusses and illustrates J.J. Thomson’s model of an atom.
4. URL: http://en.wikipedia.org/wiki/Cathode_ray
Description:
This site describes a cathode ray tube. It also gives historical information and applications of cathode ray tubes.
5. URL: http://web.lemoyne.edu/~giunta/jthomson.html
Description:
This site tells about Thomson’s experiment with the cathode rays and how the charges of the rays were discovered.
assignment 1
Please answer the following questions.
1. What are mixtures?
2.Differentiate homogeneous and heterogeneous mixture.
1. What are mixtures?
2.Differentiate homogeneous and heterogeneous mixture.
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