39 terms

Microscope Basics + Pond Water Organisms

This set covers some common types of microscopes, types of slides, but focuses mainly on the Compound Light Microscope - its parts and uses. Be prepared to label a diagram of the Compound Light Microscope for the quiz.
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Ocular lens
Allows you to view the image; also called the eyepiece
Objective lens
Found on the nose-piece and range from low (4x) to high power(100x).
Stage clip
Used to hold a slide in place on the stage.
Light Microscope
Microscope that projects light upwards to see the specimen; also called an optical microscope
Arm
This part on the side of the microscope is used along with the base to support it when it is carried.
Coarse adjustment knob
This part moves the stage up and down to help you get the specimen into view.
Fine adjustment knob
This part moves the stage slightly to help you sharpen or "fine" tune your view of the specimen.
Nosepiece
Attached to objective lenses and rotates around
Stage
Platform that holds the slide or specimen
Base
The bottom part of the microscope that is used to support it when you carry it
Cover slip
A small plastic or glass piece that is used to cover a water drop on a slide.
Slide
Small glass plate on which specimen are placed for viewing
Wet-mount slide
Way to prepare a slide using 1 drop of liquid (usually water); always uses a cover slip
Power
Refers to the degree of magnification for a lens, such as 10X, 40X, or 100X
100x
Power of magnification when using a 10x eyepiece and a 10x objective lens.
40x
Power of magnification when using a 10x eyepiece and a 4x objective lens.
400x
Power of magnification when using a 10x eyepiece and a 40x objective lens.
Diapraghm
Regulates the light on a specimen
Phytoplankton
Microscopic, autotrophic organisms that function as producers in aquatic ecosystems
Zooplankton
Microscopic, heterotrophic organisms in an aquatic ecosystem; includes water fleas, hydra, and nematodes
Hooke
Coined the term "cell" after viewing them in his microscope made using a drop of water
Leeuwenhoek
Known as the father of modern microbiology; first to observe living cells, which he called animalcules
Janssen
Brothers credited with the invention of the microscope
Electron microscope
Microscope that forms an image by focusing beams of electrons onto a specimen
High Power
Allows you to see the most detail, but you only see a tiny portion of the specimen
Low Power
Allows you to see a large portion of a specimen, but you do not see a lot of details
Water Flea
Freshwater crustacean observed in many of our pond water samples
Nematodes
Type of roundworm that can be found in water or soil
Rotifer
An aquatic invertebrate with cilia surrounding its mouth
Mosquito
Larval form with a siphon tube; also called a wiggler
Cyclops
A type of freshwater copepod; often seen with egg sacs
Dragonfly
Nymph stage of the insect; related to damselflies
Hydra
Freshwater cnidarian that uses nematocysts to paralyze its prey
Damselfly
Nymph stage of the insect; related to dragonflies
Paramecium
A protist with cilia that lives in fresh water and eats other tiny organisms for food
Mayfly
Nymph stage of the insect; in a different order than dragonflies and damselflies
Seed shrimp
Ostracod found in freshwater habitats
Scud
Small crustacean with seven pairs of legs; omnivores (eats both plants and animals)
Compound
Refers to a microscope or telescope with 2 or more lenses
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