Warm Up K-W-L: Microscope

Cell Theory Cell theory: Copy the following: 2 Viewing Cells 2 Cell Theory Copy the following: Cell theory: All organisms are made up of one or more cells. The cell is the basic unit of organization in organisms. All cells come from cells.

Cell Theory Write the cell theory.

ACOS 2 Objective: SWBAT define the difference between an atom and a molecule.

Magnification In the 1st century the romans were the first to use glass to observe small objects. They had discovered looking through glass made the object look bigger.

Magnification Salvino D’Armate made the first eye glass in the 13th century. The magnification of D’Armate’s eye glass was 1X.

Magnification Eventually simple forms of magnification glasses were about 6x-10x magnification. These simple forms were mainly used to observe insects like fleas. These early magnifiers were called “flea glasses”.

Microscopes Zacharias Jansen and his father put a couple of lenses in a tube and made some important discoveries. Jansen invented the first compound microscope.

Microscopes Antonie van Leeuwenhoek is commonly known as "the Father of Microbiology", and is best known for his work on the improvement of the microscope. Leeuwenhoek improved the microscope by improving the quality of the lens. Today’s compound microscopes can magnify from 1000X-2000X magnification.

Viewing Cells 2 Cell Theory Cells weren’t discovered until the microscope was improved. In 1665, Robert Hooke cut a thin slice of cork and looked at it under his microscope and saw empty little boxes. Hooke named the boxes he saw in the cork, “cells”.

Viewing Cells 2 Cell Theory Matthias Schleiden studied plants and concluded that all plants are made of cells. Theodor Schwann studied animal cells and concluded that all animals are made of cells. Eventually Schleiden and Schwan combined their ideas and became convinced that all living things are made of cells.

Viewing Cells 2 Cell Theory Rudolph Virchow used previous discoveries and wrote the “Cell Theory”. Cell theory: All organisms are made up of one or more cells. The cell is the basic unit of organization in organisms. All cells come from cells.