cell size & microscopy (4.1.1.1)
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11 Terms
Why are cells measured in micrometres?
due to their size,
cells are extremely small
What is the symbol for micrometre?
μm
1 millimetre equals how many micrometres?
1000 μm
Typical size of an animal cell?
About 10–30 μm
Typical size of a bacterial cell?
About 0.2–2 μm.
Why are bacterial cells smaller than plant and animal cells?
They are simpler cells with no nucleus.
What is magnification?
how many times bigger the image is compared to the real object.
Magnification formula?
Magnification = image size / real size
Rearranged formula for image size?
image size = magnification x real size
Rearranged formula for real size?
real size = image size / magnification
What is standard form?
A way of writing very large or very small numbers.