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Slide show 1 Session 1
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How can we see very small objects?
A fly A hair a spermatozoon An atom An ovum 2
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How can we see very small objects?
A magnifying glass 3
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Because of the glass? EXPERIMENT...
2: Why a magnifying glass or a microscope allow to see very small objects? Because of the glass? EXPERIMENT... 4
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An ocular A lens 5
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-1- Classify these objects
don't modify -2- These objects enlarge what? decrease 6
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1000 times smaller 1000 times smaller millimeter mm micrometer μm
nanometer nm A hair Animal cells atom 7
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