1. Discovering Cells
CH 1, Section 1 Page 6 – 13

2. An Overview of Cells
a. Cells are the __BASIC__ units of structure and function in living things.
b. Cells form the parts of an organism and carry out __ALL__ of an organism’s processes, or functions.
Brain Pop – Cells (3:16)

3. Cells and Structure
a. The __STRUCTURE__ of an object is what it is __MADE__ of and __HOW__ its parts are put together.
B. Cells and Function
a. __FUNCTIONS__ are the processes that enable it to stay __ALIVE__ and __REPRODUCE__
b. Examples: getting __OXYGEN__, getting rid of __WASTE__, and __GROWING__
C. Many and Small
a. Your skin contains more than __100,000__ cells

4. First Observations of Cells
a. The invention of the __MICROSCOPE__ made it possible for people to __DISCOVER__ and __LEARN__ about cells.
b. A __MICROSCOPE__ is an instrument that makes __SMALL__ objects look __LARGER__
c. A __SIMPLE__ microscope contains only __ONE__ lens
Brain Pop – Microscopes (3:48)

5. Robert Hooke
a. Hooke used his __MICROSCOPE__ to observe the structure of a thin slice of __CORK__
b. Hooke called the empty spaces __CELLS__, which means __SMALL ROOMS__

6. Anton Van Leeuwenhoek
a. Leeuwenhoek looked at drops of __WATER__, scrapings from __TEETH__.
b. He discovered a variety of __ONE-CELLED__ organisms.
c. He called these moving organisms __ANIMALCULES__

7. Development of the Cell Theory
A. Schleiden, Schwann, and Virchow
a. Schleiden concluded that __ALL__ plants are made of __CELLS__
b. Schwann said that all __ANIMALS__ are also made up of cells.
c. __ALL__ living things are made up of __CELLS__
d. __NEW__ cells are formed __ONLY__ from cells that already exist. “__ALL__ cells come from __CELLS__.”

8. What the Cell Theory Says
a. __CELL THEORY__ is a widely accepted explanation of the __RELATIONSHIP__ between __CELLS__ and __LIVING__ things
b. __ALL__ living things are composed of cells
c. Cells are the __BASIC__ units of __STRUCTURE__ and __FUNCTION__ in living things
d. All cells are __PRODUCED__ from other cells
Cell Theory – (3:32)

9. Light &Electron Microscopes
a. Microscopes must combine __TWO__ important properties - __MAGNIFICATION__ and __RESOLUTION__
A. Magnification and Lenses
a. __MAGNIFICATION__ is the ability to make thinks look __LARGER__ than they are.
b. A lens with the __CENTER__ thicker than the edge is called a __CONVEX__ lens.

10. Compound Microscope Magnification
a. A __COMPOUND__ microscope uses more than one __LENS__
b. The __TOTAL__ magnification of the microscope is equal to the magnifications of the __2__ lenses __MULTIPLED__ together.

11. Resolution
a. The __ABILITY__ to clearly distinguish the individual parts of an object is called __RESOLUTION__
b. __RESOLUTION__ is another term for the __SHARPNESS__ of an image.

12. Electron Microscopes
a. Electron microscopes use a __BEAM__ of __ELECTRONS__ instead of __LIGHT__ to produce a magnified image.
b. __ELECTRON__ microscopes can obtain pictures of extremely __SMALL__ objects.
Youtube – Microscope Song (4:04)