Tutorial
iGCSE Biology: Size of Specimens
Learn the formula for calculating magnification in biology, how to rearrange it, and the importance of using consistent units like millimetres and micrometres.
Tutorial
iGCSE Biology: Size of Specimens
Learn the formula for calculating magnification in biology, how to rearrange it, and the importance of using consistent units like millimetres and micrometres.
Management & Tools
Deck Contents
22 CardsLesson#1
In biology, we often use microscopes to view specimens. To understand how much larger a specimen appears, we use the concept of magnification. This relates the size of the image we see to the actual, real-life size of the specimen.
Lesson#2
The relationship is defined by a simple formula: magnification equals the image size divided by the actual size. 'Image size' is how large the specimen appears in a drawing or through the microscope, while 'actual size' is its real size.
Quiz#3
What is the formula used to calculate magnification?
magnification equals image size divided by actual size
Quiz#4
In the magnification formula, what does 'image size' refer to?
the size of the drawing or microscopic image
Quiz#5
In the magnification formula, what term is used for the real size of the specimen?
actual size
Lesson#6
A crucial rule for using the magnification formula is that the units for image size and actual size must be the same. You can't divide millimetres by micrometres directly. You must first convert one of them so they are compatible.
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