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Presentation transcript:

Slide show 1 Session 1

How can we see very small objects? A fly A hair a spermatozoon An atom An ovum 2

How can we see very small objects? A magnifying glass 3

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

An ocular A lens 5

-1- Classify these objects don't modify  -2- These objects enlarge what? decrease 6

1000 times smaller 1000 times smaller millimeter mm micrometer μm nanometer nm A hair Animal cells atom 7

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