Transcript Microscopy Lab - East Middle School

Microscopy Lab
• You will work today with some newspaper pieces
and various items of your choice .
• Remember: PLAY, BUT WITH PURPOSE!
• Please handle the microscopes carefully, follow
instructions, and write down notes from this
introduction in your science log.
• When you are done with this lab, please turn it into
the inbox with your name on it. Then you may
begin reading the “Kids Discover: Cells” magazine
quietly.
How Microscopes work:
• Observing and
Drawing Objects:
Because the light
rays from an object
cross before reaching
your eye, the image
you see through our
light microscopes will
be inverted and
upside down.
• (See next slide.)
What you see is what you get…
Sitting on the stage
Viewed through the lens
When making drawings do the following:
• For drawings only, use pencil - you can erase and
shade areas.
• Begin by identifying the area viewed through the
microscope with a circle.
• Specimens should be drawn to scale. If the
specimen takes up the whole viewing field, make
sure your drawing shows this.
• Drawings should be labeled with the specimen
name and magnification.
• Drawings should be large enough to view details
and have significant details labeled.
Why do we use stain?
•Natural cheek cells
•Stained cheek cells
Two important terms!
• Magnification: the
increase of an
object's apparent
size. Clarity of the
edges, colors, and
details may change
for the worse!
• Resolution: the
power to show
details clearly.
Resolution allows
the viewer to see
two objects that are
very close together
as two objects
rather than as one.
Care and Handling of the
Microscope:
• A microscope is a delicate piece of
equipment and should be treated with care.
• Use two hands when carrying the
microscope. Place one hand around the arm
of the microscope and the other under the
base for support.
• Carry the microscope upright and close to
the body.
Care and Handling of the
Microscope:
• Place the microscope flat on the table, but
not too near the edge where it might be
knocked off.
• DO NOT slide the microscope back and forth
on the lab table.
• If it becomes necessary to clean the lenses
on the microscope, ask your facilitator for a
piece of lens paper. Other materials, such as
paper towel, can scratch the surface of the
lens.
Just a
few of
the
parts
you
should
know.
And now…Practice!!!
• Pick up a Microscopy Lab and materials
from the front of the classroom.
• Please leave everything organized and
clean when you are finished…your
cooperation is greatly appreciated!
• For more on microscopes, visit:
http://www.ou.edu/research/electron/mirror/web-subj.html