1. Monday, January 23, 2012
Please follow the expectations for entering the classroom.
Copy today’s “I can” statement.
Fill out your agenda.
Thank you!
C: 0 (after the bell rings)
H: quietly ask neighbor; raise hand (after bell)
A: independent work
M: 0 (after bell rings)
P: completing bellringer tasks, following expectations

2. History of the Cell (including microscope)
1590
Hans & Zacharias Janssen
1st compound microscope
(tube with a lens at each end)
1838
Matthais Schleiden
All plants made of cells
1660
Robert Hooke
Added light to microscope
Observed cork oak tree bark
Cells=“tiny rectangular rooms”
1839
Theodor Schwann
All animals made of cells
1855
Rudolf Virchow
“All cells come from cells.”
1683
Anton van Leeuwenhoek
Simple microscope
Viewed pond water (animalcules), teeth scrapings (bacteria)

3. Cell Theory All living things are composed of cells.
Cells are the basic unit of structure and function in living things.
All cells are produced from other cells.
Photo: Anderson, Douglas Cork Cells. “Lens on Leeuwenhoek”. Retrieved January 22, 2012 from

4. Theories & Laws
“Theories”
“Laws”
In everyday speech, people use the word theory to mean speculation or an idea that’s uncertain (“I have a theory about why I wearing blue brings me good luck”).
In science, a theory is a well-tested concept that consistently explains a wide range of observations and predicts future events.
A theory may be the best explanation to date, but no theory is beyond dispute.
Remember, scientists are ALWAYS trying to disprove hypotheses!
In everyday speech, a law refers to the rules and guidelines to govern behavior.
A scientific law is a statement about how things work in nature that seems to be true all the time. They do not explain why things happen.

5. Important vocabulary terms
Cell: The basic unit of structure and function in living things
How does a cell relate to an atom?
Unicellular:
One-celled organism
Multi-cellular:
Organism with more than one cell
Prokaryote: simple organism; cell without a nucleus (includes bacteria and blue-green algae)
Eukaryote: type of cell with a “true” nucleus (includes all animal and most plant cells)

6. Paramecium
Unicellular organisms found in aquatic ecosystems (lakes, streams, rivers, etc.)
Paramecium: Photo 1. Retrieved January 22, 2010 from
Paramecium multimicronucleatum - Ciliated Protozoan (SEM x1,600). This image is copyright Dennis Kunkel at Retrrieved January 22, 2012 from

7. Microscope Drawing
On the next clean page in your notebook, sketch the microscope on your table in its entirety. Be as detailed as possible!

9. Ender Copy and complete the following: Made of cells=
Not made of cells=
*Try to think of examples not included in your word list!*
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On the way out the door, tell me something that IS made of cells!