Docstoc

Using a Microscope and Life in a Pond

Document Sample
Using a Microscope and Life in a Pond Powered By Docstoc
					So what is this stuff?

Filamentous Algae

Oedogonium

Zygnema

Free living algaes

Algae

Netrium (algae)

Cladophora

Protists

Perenema
Blepherisma

Volvox / Paramecium

Volvox

Paramecium

Euglena

Stentor / Amoeba

Amoeba

Stentor

C y c l o p s

Cyclops (Copapod)

Daphnia

Daphnia

Ostracod

Cypris Ostracod

Nematode

Nematode (Round worm)

Rotifers

Rotifer

Tardigrade

Tardigrade (Water bear)

Microscope parts and functions

Making the Pond Water Slide
• Place one or two drops with some algae on slide. • Carefully place coverslip at a 45 degree angle and touch the liquid. • Lower coverslip until it lies flat.

Using the Microscope
• Make sure the low power lens (4x) is clicked in place. (over the opening in the stage) • With the light on, look through the eyepiece adjust the diaphragm until you see a bright circle of light. • Place and fasten the prepared slide to the stage. Center some algae in the stage opening. • Lower the objective lens so it is at its closest point to the slide. (look from the side)

Using the Microscope (cont.)
• Looking through the eyepiece, slowly turn the coarse adjustment knob, moving the lens away until objects come into focus. • Move the slide over the stage with knobs or fingers until a specimen of interest is centered. • Observe specimens as desired. Then switch to medium or high power. Use the fine adjustment knob to adjust the focus.

Pondwater Lab
• On a piece of paper make drawings of 2 different organisms you see in a drop of pond water. Identify and label them from the photos. • Describe if you think each organism is single-celled or multi-celled. • Label any cell parts you can identify.


				
DOCUMENT INFO
Shared By:
Stats:
views:83
posted:4/17/2008
language:English
pages:22