Scientific Measurement. Bell Ringer What are the two different types of microscopes?
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Transcript of Scientific Measurement. Bell Ringer What are the two different types of microscopes?
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Scientific Measurement
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Bell Ringer
What are the two different types of microscopes?
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What are these?
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Conversions
K H D b d c m
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Group Challenge
7m = _____ Kilometers
2.3L = _____ milliliters
1750g = _____Kilograms
250cm = _____ Meters
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History of the Microscope
Invented between 1590-1600 Robert Hooke-1665 viewed cells for the
first time Anton van Leewenhoek- first to describe
bacteria
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Microscopes
Light Microscope – light passes through one or more lenses to produce an enlarged image of a specimen.
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Light Microscope
Use two lenses
A light bulb in the base shines light up through the specimen mounted on a glass slide. The objective lens then collects the light, which then travels to the eye.
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Microscopes
Electron Microscope – forms an image of a specimen using a beam of electrons rather than light.
Can magnify up to 200,000x
Living things can’t be seen under an Electron microscope because the specimens have to be looked at while in a vacuum.
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Electron Microscope
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Microscopes
Magnification – is the quality of making an image appear larger than its actual size.
Resolution – Is a measure of the clarity of an image.