Stem MICROSCOPE Bedienungsanleitung Seite 5

Spirogyra w.m.
Though they are not classified as plants, most algae have cell walls and can create
chemical energy from sunlight—a process called photosynthesis. Spirogyra are
free-floating algae found in fresh water all over the world. They are characterized
by long strands of cells containing spiral-shaped chloroplasts—the part that
photosynthesizes. Look for the cell walls and chloroplasts in your specimen.
Lichens sec.
Lichens are formed by a partnership of algae and fungi, called "symbiosis".
Typically, most of the lichen is made up of the fungus, with the algae concentrated
in the upper portion, where they can gather sunlight to make food for the fungus.
The fungus creates a dense upper and lower layer, called the "cortex", to protect
the more loosely organized fungal strands and the all-important algae cells.
Earthworm t.s.
Earthworms have an outer ring of muscle protected by a thin layer of epidermis
(skin), with an inner ring of intestine to digest food. The intestine includes a fold
of tissue called a typhlosole that increases the surface area of the intestine to
allow it to absorb more nutrients. Do you see it
INSTRUCTIONS FOR PREPARING SLIDES FOR YOUR MICROSCOPE
BATTERY INSTALLATION AND CHARGING
NOTE: When preparing slides you want to use the thinnest possible sample. Have
an adult use a razor blade or sharp knife to cut slices for you to try. DO NOT CUT
SPECIMENS WITHOUT ADULT SUPERVISION.
Wet Mount Slides
The most common way to prepare a specimen is with a "wet mount", and here's
how you do it:
1. Place a drop or two of liquid in the center of the slide.
The liquid should be larger than your specimen.
2. Using a toothpick or tweezers,
place your specimen on the
water droplet, making sure it is
not folded or scrunched. Your
specimen should be no larger
than the cover slip.
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