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Unit 2 Miss Edwards
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Unit 2 Mrs Carne
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Cards (2120)
What type of beam does a light microscope use?
A
beam
of
light
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What type of images can light microscopes see?
Colour images
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Why is the resolution power of light microscopes lower?
Because they use a longer
wavelength
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Can light microscopes observe live specimens?
Yes
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How does the magnification of light microscopes compare?
It is
lower
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What type of beam does an electron microscope use?
A beam of
electrons
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What type of images can electron microscopes see?
Black and white
images
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Why must specimens be dead for electron microscopy?
Because
electron microscopes
cannot observe live specimens
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How does the resolution power of electron microscopes compare to light microscopes?
It is
higher
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How does the magnification of electron microscopes compare?
It is
higher
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What advantages do electron microscopes have over light microscopes?
Higher magnification
and
resolution
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What is the calibration process for microscopes?
Identify
eyepiece units
to
stage micrometre units
.
Start from zero at the same point.
Multiply eyepiece unit by
divisions
(
0.1
/
0.01
).
Ensure each unit is the same.
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What is the first step in calibration for microscopes?
Identify
eyepiece
units to
stage micrometre
units
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Why is it important to start from zero in calibration?
To ensure
accurate
measurement comparison
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If you have 1 eyepiece unit, how do you convert it to stage micrometre units?
Multiply by the
divisions
between eyepiece
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What must be ensured when calibrating units?
Each
unit
must
be
the
same
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How do you convert from µm to mm?
Divide by
1000
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How many millimeters are in a meter?
1000
mm
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What is the conversion of 1 mm to meters?
0.001
m
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How is 1 µm expressed in terms of mm?
1 mm ÷
1000
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How many millimeters are in a centimeter?
10
mm
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What is the conversion factor from mm to nm?
Multiply by
1,000,000
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What are the key metric conversions mentioned?
1 m
= 1000 mm
1 mm
= 0.001 m
1 µm
= 1 mm ÷ 1000
1 cm
= 10 mm
mm to nm
= x1000000
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Aerobic respiration
produces
ATP
from
glucose
using
oxygen
as an electron acceptor.
The mitochondria is the site of aerobic respiration
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