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Microscopes and magnification

7th grade (Year 8 in England) · 16 questions · Common Core: NGSS.MS-LS1-1 · England: KS3 Biology: Cells and organisation, KS4 Combined Science: Cell biology

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Date

Score/ 16

  1. Question 1

    A cell is 0.05 mm wide. It is viewed at ×100. How wide is the image, in mm?

    Answermm

  2. Question 2

    A microscope has a ×5 eyepiece lens and a ×10 objective lens. What is the total magnification?

    Answer

  3. Question 3

    An image of a cell is 25 mm wide at ×1000. What is the real width of the cell, in micrometres (µm)? (1 mm = 1000 µm)

    Answerµm

  4. Question 4

    A cell is 0.01 mm wide. It is viewed at ×500. How wide is the image, in mm?

    Answermm

  5. Question 5

    A microscope has a ×5 eyepiece lens and a ×4 objective lens. What is the total magnification?

    Answer

  6. Question 6

    An image of a cell is 8 mm wide at ×1000. What is the real width of the cell, in micrometres (µm)? (1 mm = 1000 µm)

    Answerµm

  7. Question 7

    A cell is 0.05 mm wide. It is viewed at ×40. How wide is the image, in mm?

    Answermm

  8. Question 8

    A microscope has a ×10 eyepiece lens and a ×4 objective lens. What is the total magnification?

    Answer

  9. Question 9

    An image of a cell is 25 mm wide at ×500. What is the real width of the cell, in micrometres (µm)? (1 mm = 1000 µm)

    Answerµm

  10. Question 10

    A cell is 0.02 mm wide. It is viewed at ×500. How wide is the image, in mm?

    Answermm

  11. Question 11

    A microscope has a ×15 eyepiece lens and a ×10 objective lens. What is the total magnification?

    Answer

  12. Question 12

    An image of a cell is 10 mm wide at ×1000. What is the real width of the cell, in micrometres (µm)? (1 mm = 1000 µm)

    Answerµm

  13. Question 13

    A cell is 0.01 mm wide. It is viewed at ×200. How wide is the image, in mm?

    Answermm

  14. Question 14

    A microscope has a ×10 eyepiece lens and a ×10 objective lens. What is the total magnification?

    Answer

  15. Question 15

    An image of a cell is 2.5 mm wide at ×100. What is the real width of the cell, in micrometres (µm)? (1 mm = 1000 µm)

    Answerµm

  16. Question 16

    A cell is 0.05 mm wide. It is viewed at ×40. How wide is the image, in mm?

    Answermm

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Answer key: Microscopes and magnification

  1. 1. 5 mm

  2. 2. 50

  3. 3. 25 µm

  4. 4. 5 mm

  5. 5. 20

  6. 6. 8 µm

  7. 7. 2 mm

  8. 8. 40

  9. 9. 50 µm

  10. 10. 10 mm

  11. 11. 150

  12. 12. 10 µm

  13. 13. 2 mm

  14. 14. 100

  15. 15. 25 µm

  16. 16. 2 mm