1. 1.1 Notes The Cell is the Basic Unit of Life
Chapter 1
1.1 Notes
The Cell is the Basic Unit of Life

2. Prokaryotic VS. Eukaryotic
Prokaryotic/Unicellular – made up of only one cell Ex. Stentor
Eukaryotic/Multicellular – made up of two or more cells Ex. Humans
Eukaryotic - Has all the organelles
Both unicellular and multicellular living things are called organisms
Stentor

3. 1.1 Observing Living Things
Living things all:
Respond to their environment
Need energy
Grow
Reproduce
Get rid of wastes
Living things are in every environment on earth
Largest living organism = honey mushroom 890 hectares
Strongest living organism = rhinoceros beetle 850x
Fastest living organism = cheetah 100km/hr

4. The Microscope Use microscope to look at small organisms
Types of microscopes – magnifying glass, compound microscope, electron microscopes, and scanning electron microscopes
Electron microscopes produce pictures called electron micrographs
Anton Van Leeuwenhoek = first person to build a microscope

5. The Compound Microscope
Eyepiece
Ocular Lens
Used for viewing and contains a lens that magnifies(10X)
Arm
Supports the eyepiece and objective lenses
Coarse Focus Knob
Focus at LOW power ONLY
Fine Focus Knob
Focus at MEDIUM or HIGH Power
Objective Lenses
Magnify the image (3-4)
Revolving Nosepiece
Holds the three objective lenses
Stage
Supports the slide (stage clips to hold slide)
Light Source
Supplies the light needed to view the slide
Base
Supports the entire microscope
Iris Diaphragm
Controls the amount of light that enters

6. The Compound Microscope

7. Magnification of Compound Microscopes
When you look through a compound microscope the image you see will be:
Magnified – Inverted – Reversed
Magnification of Compound Microscopes
Low power = 4x
Medium power = 10x
High power = 40x
Eyepiece = 10x
Total Magnification = objective lens x eyepiece
Low power= Ex. 4x10 = 40X
Medium power = ________________________
High power = ___________________________
Letter e under a microscope

8. How Close Can We Go? Resolving Power
=the ability to distinguish between two dots or objects that are very close together
The microscope extends the human eyesight allowing us to see things that are closer together. (.2um for the compound microscope)

9. What Some Real Cells Look Like…

10. Your Turn! Page 20 - Look at the prefixes and know how to use them
Reading Check Page 15 – Questions 1-5
Page 21 – Questions 5-8

11. What You Need for Your Labs
How to Label Microscope Diagrams
1. Always draw diagrams in pencil 2. Keep diagrams fairly large 3. Name the diagram or object 4. Label the diagram 5. State the magnification, if using a microscope 6. Include any important notes about the diagram, such as the stain used