Magnification of cells Practice exercise 4

A technician is using the microscope shown below to observe a diseased maize leaf. The eye-piece lens is ×6 and the objective lens is ×30. What magnification is being used?

Which of the following best defines “total magnification” when using a light microscope in school science experiments?  (1 mark)

Which of the following best defines “total magnification” when using a light microscope in school science experiments?  (1 mark)

Which of the following best defines “total magnification” when using a light microscope in school science experiments?  (1 mark)

Which of the following cannot be clearly observed using a light microscope in a Grade 8 lab?

Which of the following cannot be clearly observed using a light microscope?   (1 mark)

Which of the following cannot be clearly observed using a light microscope?   (1 mark)

Which of the following cannot be clearly observed using a light microscope?   (1 mark)

What is the correct reason for starting with the low power lens when viewing a specimen under a light microscope?

What is the correct reason for starting with the low power lens when viewing a specimen under a light microscope?  (1 mark)

What is the correct reason for starting with the low power lens when viewing a specimen under a light microscope?  (1 mark)

What is the correct reason for starting with the low power lens when viewing a specimen under a light microscope?  (1 mark)

The image below shows a light microscope setup with an eye-piece lens labeled ×15 and an objective lens labeled ×10. What is the total magnification?

When calculating total magnification under a light microscope, which principle must be followed to ensure accurate observation?  (1 mark)

When calculating total magnification under a light microscope, which principle must be followed to ensure accurate observation?  (1 mark)

When calculating total magnification under a light microscope, which principle must be followed to ensure accurate observation?  (1 mark)

Which of the following is NOT a common magnification for an eye-piece lens in a light microscope used in Grade 8 science?

Which of the following is NOT a common magnification for an eye-piece lens in a light microscope used in Grade 8 science?

Which of the following is NOT a common magnification for an eye-piece lens in a light microscope used in Grade 8 science?

Which of the following is NOT a common magnification for an eye-piece lens in a light microscope used in Grade 8 science? (1 mark)

A science student filled the table below to calculate the total magnification of various microscope settings. Which of the following values correctly completes the missing total magnification for the last row? Eye-piece lens magnificationObjective lens magnificationTotal magnification ×10×40×400 ×10×100×1000 ×15×100? What is the missing total magnification?

A science student filled the table below to calculate the total magnification of various microscope settings. Which of the following values correctly completes the missing total magnification for the last row?  (1 mark) Eye-piece lens magnification Objective lens magnification Total magnification ×10 ×40 ×400 ×10 ×100 ×1000 ×15 ×100 ?

A science student filled the table below to calculate the total magnification of various microscope settings. Which of the following values correctly completes the missing total magnification for the last row?  (1 mark) Eye-piece lens magnification Objective lens magnification Total magnification ×10 ×40 ×400 ×10 ×100 ×1000 ×15 ×100 ?

A science student filled the table below to calculate the total magnification of various microscope settings. Which of the following values correctly completes the missing total magnification for the last row?  (1 mark) Eye-piece lens magnification Objective lens magnification Total magnification ×10 ×40 ×400 ×10 ×100 ×1000 ×15 ×100 ?

A science student filled the table below to calculate the total magnification of various microscope settings. Which of the following values correctly completes the missing total magnification for the last row?  (1 mark) Eye-piece lens magnification Objective lens magnification Total magnification ×10 ×40 ×400 ×10 ×100 ×1000 ×15 ×100 ?

The microscope below is set to ×15 eyepiece and ×40 objective. A learner estimates the size of a plant cell as 0.01 mm under this magnification. If the same cell is observed under ×1000 magnification, what would be the new observed size?

A learner observed plant cells using a microscope with ×15 eyepiece and ×40 objective. She noted the cell wall and nucleus clearly but could not see the chloroplasts distinctly. She decides to increase the total magnification. Which one of the following adjustments would help her achieve this goal most effectively?  (1 mark)

A learner observed plant cells using a microscope with ×15 eyepiece and ×40 objective. She noted the cell wall and nucleus clearly but could not see the chloroplasts distinctly. She decides to increase the total magnification. Which one of the following adjustments would help her achieve this goal most effectively?  (1 mark)

A learner observed plant cells using a microscope with ×15 eyepiece and ×40 objective. She noted the cell wall and nucleus clearly but could not see the chloroplasts distinctly. She decides to increase the total magnification. Which one of the following adjustments would help her achieve this goal most effectively?  (1 mark)

A student observed onion epidermal cells under a light microscope using ×10 eyepiece lens and ×10 objective lens. She could only see the outline of the cells faintly. Her teacher advised her to adjust the objective lens. After changing it, she could clearly see the nucleus and cell wall. Which of the following most likely describes the change she made?

A student observed onion epidermal cells under a light microscope using ×10 eyepiece lens and ×10 objective lens. She could only see the outline of the cells faintly. Her teacher advised her to adjust the objective lens. After changing it, she could clearly see the nucleus and cell wall. Which of the following most likely describes the change she made?  (1 mark)

A student observed onion epidermal cells under a light microscope using ×10 eyepiece lens and ×10 objective lens. She could only see the outline of the cells faintly. Her teacher advised her to adjust the objective lens. After changing it, she could clearly see the nucleus and cell wall. Which of the following most likely describes the change she made?  (1 mark)

A student observed onion epidermal cells under a light microscope using ×10 eyepiece lens and ×10 objective lens. She could only see the outline of the cells faintly. Her teacher advised her to adjust the objective lens. After changing it, she could clearly see the nucleus and cell wall. Which of the following most likely describes the change she made?  (1 mark)

Two students used microscopes to view similar cell specimens. Student A used ×10 eyepiece and ×100 objective lens, while Student B used ×15 eyepiece and ×40 objective lens. Who achieved a higher magnification and by how much?

Two students used microscopes to view similar cell specimens. Student A used ×10 eyepiece and ×100 objective lens, while Student B used ×15 eyepiece and ×40 objective lens. Who achieved a higher magnification and by how much?  (1 mark)

Two students used microscopes to view similar cell specimens. Student A used ×10 eyepiece and ×100 objective lens, while Student B used ×15 eyepiece and ×40 objective lens. Who achieved a higher magnification and by how much?  (1 mark)

Two students used microscopes to view similar cell specimens. Student A used ×10 eyepiece and ×100 objective lens, while Student B used ×15 eyepiece and ×40 objective lens. Who achieved a higher magnification and by how much?  (1 mark)

The table below shows the magnification settings recorded by a learner. One of the total magnifications is incorrect. Which row contains the error? Eye-piece lens magnificationObjective lens magnificationTotal magnification ×10×4×40 ×10×10×100 ×10×40×400 ×10×100×400

The table below shows the magnification settings recorded by a learner. One of the total magnifications is incorrect. Which row contains the error?   (1 mark) Eye-piece lens magnification Objective lens magnification Total magnification ×10 ×4 ×40 ×10 ×10 ×100 ×10 ×40 ×400 ×10 ×100 ×400

The table below shows the magnification settings recorded by a learner. One of the total magnifications is incorrect. Which row contains the error?   (1 mark) Eye-piece lens magnification Objective lens magnification Total magnification ×10 ×4 ×40 ×10 ×10 ×100 ×10 ×40 ×400 ×10 ×100 ×400

The table below shows the magnification settings recorded by a learner. One of the total magnifications is incorrect. Which row contains the error?   (1 mark) Eye-piece lens magnification Objective lens magnification Total magnification ×10 ×4 ×40 ×10 ×10 ×100 ×10 ×40 ×400 ×10 ×100 ×400