learning how to use the microscope
TRANSCRIPT
Parts of the Microscope4. Diaphragm
(controls amount
of light)
1 = lowest setting/
5 = highest setting
• Eyepiece: 10 X by itself
• Scanning lens:
• 4X; red color
• Eyepiece X Scanning lens = total
• TOTAL magnification of 40 X
• mainly used for large objects/scanning
• Eyepiece: 10 X by itself
• High Power: 40 X;
• blue color
• TOTAL magnification of 400 X
• mainly used for smaller objects/details
Parts of the Microscope Clip
When you are ready to start:
Make sure it is on SCANNING power!The stage should be all the
way down (you focus by slowly moving it up!)Check the light setting
(should be at 1-2 to start)
When putting the microscope away (at the end of the day):
It should be on SCANNING power.The stage should be all the way
DOWN (do this with the course focus knob!)
The light switch should be OFF
TROUBLESHOOTINGWhat if you can’t get your object into focus?
• Check that you have one of the lenses clicked into place
• Check that your disc diaphragm is in place (not IN BETWEEN settings)
TROUBLESHOOTINGWhat if you can’t get your object into focus?
• Clean off your lenses using LENS PAPER. (Also, dirty slides are hard to focus on; so clean them, too!)
• GO BACK TO LOW POWER AND START OVER!
• Use a MAGNETIC field to bend beams o of electrons; used to see things at much higher level of detail
• Can magnify images up to 1,000,000times!
Electron Microscope Images:
http://www.pbrc.hawaii.edu/bemf/microangela/
Images through an electron microscope
Simple vs. Compound VideoClip
Microscopes by Brainpop
Roll
Assignment 10/13
ONLY WRITE THE QUESTION!
1. Cell Theory states all of the following except:a. Cells are the basic units of life
b. All organisms are made up of one or more cells
c. Atoms and molecules are the smallest forms of life
d. All cells come from cells that already exist.
2. List the 5 Scientists we learned in class and their contribution to
Science.
(DO NOT USE YOUR NOTES OR JOURNAL.. USE YOUR
MEMORY!)
Zaccharias Janssen- Eyeglass maker/ first compound microscope
Anton Van Leewenhoek- looked at pond water with a tiny glass bead
Robert Hooke- Discovered that cork was made up of little boxes called cells
Mattias Schlieden- Said all plants were made of cells
Theodor Schwann- Said all animals were made of cells
Rudolph Virchow- Said all cells divide to make new cells