Scanning Electron Microscope

URL: http://www.mos.org/sln/sem/

Click on the link “How it works”

Use the SLIDE SHOW and click on each slide. As you go answer True or False to the following statements:

T or F The Scanning Electron Microscope creates the magnified images by using light waves.

T or F SEM images are black and white.

T or F Living specimens can be viewed with an SEM.

T or F SEM samples are coated in gold to make them conduct electricity.

T or F An electron gun emits electrons which travel through a series of magnetic lenses.

T or F A detector is used to count the number of electrons emitted from the electron gun.

Label the parts of the electron microscrope:

Now try an Electron Microscope by using the virtual microscope located at:

http://micro.magnet.fsu.edu/primer/virtual/virtual.html
(click on scanning electron microscope link at the top)

Practice on the following views:

Bullet ant
Carpet Beetle
Centric Diatom
Cockroach
Diatom
Grasshopper
House dustmite

Fruit Fly
Gecko Foot
Honeybee
Jellyfish
Mayfly
Ragweed Pollen
Star Sand

Some Other Virtual Microscopes to Look at

http://school.discovery.com/lessonplans/interact/vemwindow.html
http://www.pfizerfunzone.com/funzone/discovery/microscope/play_game.html

Remember that SEM's are always in black and white, but several photographs are colorized to make them more dramatic.
View colorized SEM Images at

http://www.pbrc.hawaii.edu/bemf/microangela/

Make sure you look at the following:

Penicillium
Leptospira
Bacteria
Mold
Head Louse
Red Blood Cells
Neuron

Ready to take your quiz? Make sure you’ve looked at all the images before going to the quiz. The quiz will test you ability to identify these images

http://school.discovery.com/quizzes6/muskopf/microscopy.html