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Introduction to the Microscope Investigation 2

Introduction to the Microscope Investigation 2. Contrasting Cases Part 1 – Compare microscopes and telescopes. Introduction to magnification. What are some tools used to magnify images? Have you ever used these any of these tools? When can it be useful to magnify an image?.

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Introduction to the Microscope Investigation 2

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  1. Introduction to the Microscope Investigation 2 Contrasting Cases Part 1 – Compare microscopes and telescopes

  2. Introduction to magnification • What are some tools used to magnify images? • Have you ever used these any of these tools? • When can it be useful to magnify an image?

  3. Introduction to magnification What do these two things have in common? How are they different from each other?

  4. Telescope and microscope Telescope Both Microscope

  5. Telescopes • What are some living things that might be viewed through a telescope? • What are some non-living things that might be viewed through a telescope?

  6. Nearby telescopic images How does a telescope change the image of this boat on a lake?

  7. Compare telescope images How does a telescope change the image of the moon (top) and Jupiter (bottom)?

  8. Compare the things being magnified by the telescope. How are they similar? How are they different?

  9. Microscopes • What are some living things that might be viewed through a microscope? • What are some non-living things that might be viewed through a microscope?

  10. Compare images How does a microscope change the appearance of the mixture of water and brine shrimp inside the cup?

  11. Compare images How does a microscope change the appearance of the blood on the slide?

  12. Compare images Compare the things being magnified by the microscope. How are they similar? How are they different?

  13. Compare the types of things telescopes and microscopes magnify. Can you add to your comparison list?

  14. Telescope and microscope Telescope Both Microscope - For things that are visible size but far away - Magnify images - For living and non-living - Come in different types, strengths - Scale of objects observed varies greatly - Image created shows more detail than object - For things that are tiny or invisible size but nearby

  15. Compare images Now compare a few more images. Can you tell which of these images are from microscopes and which are from telescopes?

  16. Levels of magnification An optical microscope, like the ones used in a science classroom, has different levels of magnification. Below are four images of human blood at different magnifications. Which image has been magnified the least? The most?

  17. Levels of magnification 40x 100x 400x 1000x

  18. Compare field of view By placing a clear ruler under a microscope, you can measure the field of view. Which image has been magnified the least? The most?

  19. Compare field of view By placing a clear ruler under a microscope, you can measure the field of view. 40x 100x 400x Which image has been magnified the least? The most?

  20. Compare blood and field of view Compare the ruler and blood, which are both magnified to the same level. 400x 400x How big do you think a red blood cell is?

  21. Compare optical and electron Compare the images of blood below. What are the differences? 1000x 11,000x

  22. Compare levels of magnification • Like optical microscopes, electron microscopes can be used to study non-living objects and well as living cells and organisms. • In your notebook, draw what you think sugar looks like when magnified through an optical microscope. • Now draw what you think it looks like at a higher magnification through an electron microscope.

  23. Compare levels of magnification Which image is more magnified? How can you tell? Electron microscope Optical microscope

  24. Compare levels of magnification Now compare a microscopic organism, a brine shrimp, at different levels of magnification. Optical Microscope Electron Microscope

  25. Discussion • Why might an early scientist using a weak optical microscope have believed that nothing could be smaller than a cell? • When might the higher levels of magnification produced by an electron microscope be helpful to scientists? • How do scientists today know that there are many smaller levels beyond the cell?

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