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

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)

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. 2009. Cork Cells. “Lens on Leeuwenhoek”. Retrieved January 22, 2012 from http://lensonleeuwenhoek.net/microscopes.htm

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.

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)

Paramecium Unicellular organisms found in aquatic ecosystems (lakes, streams, rivers, etc.) Paramecium: Photo 1. Retrieved January 22, 2010 from http://www.fcps.edu/islandcreekes/ecology/paramecium.htm Paramecium multimicronucleatum - Ciliated Protozoan (SEM x1,600). This image is copyright Dennis Kunkel at www.DennisKunkel.com. Retrrieved January 22, 2012 from http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookdiversity_3.html

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

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