. Intended Learning Outcomes:

• Use reference sources to obtain information.
  
• Historical development of science, developments in technology, contributions of scientists.
  
• Basic science facts.
  
• Construct a chart (timeline).

Summary:

• 1. Students will work in pairs to research historical events leading to the development of the cell theory.
  • Research should include contributions made by the following people/scientists -Robert Hooke, Hans and Zacharias Janssen, Anton van Leeuwenhoek, Matthias Schleiden, Theodor Schwann, Rudolph Virchow, etc. and dates of their contributions.
    
• 2. Students will report on their findings by constructing a timeline showing the chronology of the historical events leading to the development of the cell theory.
• 3.  Students will respond to the five prompts listed below.

Materials for each student or pair of students:

• Reference materials (textbook and Internet pages)
• rulers
• paper
• colored pencils

Student Procedures:

• Research the following people: List some of their contributions to science and dates of these contributions.-
  

  Robert Hooke - Source 1  Source 2  Source 3 Source 4  Source 5

  Hans and Zacharias Janssen - Source 1   Source 2  Source 3  Source 4
  

  Anton van Leeuwenhoek - Source 1  Source 2  Source 3  Source 4
  

  Matthias Schleiden - Source 1  Source 2    Source 3   Source 4
  

  Theodor Schwann - Source 1   Source 2   Source 3   Source 4
  

  Rudolph Virchow -  Source 1  Source 2   Source 3   source 4

  
  

• Draw a timeline showing the chronological order of these scientists and their contributions.
  

  Label the timeline with dates of the above scientists' discoveries.
  

  The earliest date should be on the left of the timeline and the most recent date on the right.
  

  Label each date with the corresponding scientist's name and contribution(s) in an organized and legible manner.
  

  Be sure your spacing shows a reasonable approximation of the amount of time elapsed between dates.

   

• Respond to the five questions below.  Your responses should be on the same sheet as your timeline.  Be sure to restate the prompt, write in complete sentences and give specific information.  Do not use the words it or they.

Questions:

1. What theory did these scientists provide evidence for?

2. What instrument was necessary before the cell theory could be developed?

3. Which three scientists directly contributed evidence for the cell theory?

4. How did the earlier scientists and their contributions directly affect the discoveries of later scientists (see #2)? For example, what had to come first?

5. List the three parts of the cell theory as stated in your textbook.   Read the cell theory as stated in this reference:  What is the Cell Theory  Describe the differences between each.

When your timeline and questions are complete, follow this link.