UB BIO 200 - Study Guide for Practical 1 (5 pages)

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Study Guide for Practical 1



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Study Guide for Practical 1

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Pages:
5
School:
University at Buffalo, The State University of New York
Course:
Bio 200 - Evolutionary Biology
Evolutionary Biology Documents

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Study Guide for Practical 1 10 19 2012 Steps of the scientific method Observation of phenomenon Question Hypothesis Experiment Conclusions Theory a well substantiated explanation of some aspect of the natural world based on a body of facts that have been repeatedly confirmed through observation and experiment Broader in scope than a hypothesis General enough to spin off many new specific hypothesis Supported by a much greater body of evidence Hypothesis Proposed explanation for a hypothesis Parts of a Microscope Base Supports the entire microscope Located at the bottom of the microscope Substage Light Light source or Illuminator Provides light for viewing Powered by the on switch Stage Where the specimen sits A clip on the stage stage clip holds the slide Slide can be moved with two knobs Condenser A lens that focuses light through a specimen Located beneath the stage Iris Diaphragm Lever A lever located under the stage that controls a shutter opening which allows you to control and adjust the amount of light passing through a specimen o The magnification you choose will match the magnification of the objective lens Coarse adjustment knob Used to focus a specimen when using low power objective 10x Fine adjustment knob Used to focus on a specimen when using the high power objective or oil immersion objective lens Used to refine focus under low power 10x Head or Body Tube part of the microscope that the oculars and nosepieces are attached too This is where the lenses are located Arm Supports the upper parts of the microscope used to carry the microscope Ocular eyepieces The lens through which you look Magnifies the specimen by a factor of 10x Nosepiece Revolves and holds that objective lens When the nose piece clicks the objective is set in place Objective lenses Located on revolving nosepiece Magnifies the specimen in conjunction with eyepiece o Scanning 4x with ocular 40x Total Magnification o Low Power 10x with ocular 100x Total Magnification o High Power 40x with



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