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IB Bio Magnification Workbook

The document contains exercises related to magnification and measurement units in microscopy, including tasks to complete diagrams and tables for nanometers, micrometers, and millimeters. It also includes definitions of magnification and resolution, calculations for total magnification, and practical applications involving measurements of cellular structures. Additionally, it provides diagrams for calculating actual lengths and magnifications of various cell types as viewed under an electron microscope.

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Grumpy Neko
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286 views6 pages

IB Bio Magnification Workbook

The document contains exercises related to magnification and measurement units in microscopy, including tasks to complete diagrams and tables for nanometers, micrometers, and millimeters. It also includes definitions of magnification and resolution, calculations for total magnification, and practical applications involving measurements of cellular structures. Additionally, it provides diagrams for calculating actual lengths and magnifications of various cell types as viewed under an electron microscope.

Uploaded by

Grumpy Neko
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Magnification Name___________________________

Units of measurement
1) Complete the diagram below to show: names of the units of measurement, unit
symbols, mathematical operations for converting between units.

2) Complete the table below to show the corresponding value nanometers, micrometers
and millimeters for the measurements given in each row. The first row has been
completed for you. Ensure that your answers use the correct unit symbols.

Nanometer micrometer millimeter


5 0.005 0.000005
1
1
1
3
7
0.5

3) When studying cells structure using a microscope the smallest unit of measurement
commonly used to describe findings is the nanometer. Explain why.

 A Harwood 2014
Magnification and Resolution
1) Define the following terms:

Magnification:

Resolution:

Calculating total Magnification of a compound light microscope

Objectiv
Eyepiece Overall
e
Magnific Magnific
Magnific
ation ation
ation
X10 X4
X10 X10
X10 X40
X10 X100
Calculating Cell
Magnification from images

 A Harwood 2014
The diagram below is a drawing of an organelle from a ciliated cell as seen with an
electron microscope.

A B

× 20 000

Calculate the actual length of the organelle as shown by the line AB in the
diagram. Express your answer to the nearest micrometer (m).

Show your working.

Answer = ........................................... m

The diagram below is a drawing of an alveolus together with an associated blood


capillary.

blood
capillary
alveolus lined w ith
squam ous epithelium

cell X

The line AB in the diagram represents an actual distance of 1.5 µm.

Calculate the magnification of the drawing. Show your working.

Answer = × .................................................

 A Harwood 2014
The diagram below shows the general structure of an animal cell as seen under an electron
microscope.

_________
5m

1) Calculate the magnification factor of the diagram

2) Calculate the actual length of structure G

3) Calculate the diameter of the nucleolus (structure B)

4) Calculate the diameter of the nucleus

5) Calculate the diameter of the cell at its widest point

 A Harwood 2014
The diagram below shows the general structure of a plant cell when viewed under
and electron microscope.

___________
40m
1) Calculate the magnification factor of the diagram

2) Calculate the thickness of the cellulose cell wall.

3) Calculate the length of the cell.

4) Calculate the length of structure C.

5) Calculate the length of the vacuole.

 A Harwood 2014
Calculate the actual length of structure C.

Show your working and give your answer in micrometers (μm).

Answer = ………………………………………………………….. μm

 A Harwood 2014

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