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B1: Quiz 5 – Answers
B1: Quiz 5 – Answers
1)
a) We cut a thin slice of the specimen so that light can pass through the specimen, which allows us to see the subcellular structures (if the slice was thick, little or no light would pass through, thus meaning that we wouldn’t be able to see the subcellular structures)
b) The stain makes it easier to see the subcellular structures in the specimen
c) Air bubbles on the slide will obscure our view when we are looking at the specimen through the microscope
2)
a) Start with the lens with the lowest magnification
b)
i) The coarse adjusting knob brings the specimen/ stage to just below the lens. It also brings the specimen into focus/ nearly into focus
ii) The fine adjusting knob brings the specimen into focus
c) They can use a higher-powered lens/ a lens with a greater magnification
d) The ruler allows the student to see the scale/ the size of the field of view
3)
a) Yes – we use unbroken lines
b) No – we do not shade/ colour in any areas on our sketch
c) We make our sketch as large as possible
d) Any 3 from:
a) We cut a thin slice of the specimen so that light can pass through the specimen, which allows us to see the subcellular structures (if the slice was thick, little or no light would pass through, thus meaning that we wouldn’t be able to see the subcellular structures)
b) The stain makes it easier to see the subcellular structures in the specimen
c) Air bubbles on the slide will obscure our view when we are looking at the specimen through the microscope
2)
a) Start with the lens with the lowest magnification
b)
i) The coarse adjusting knob brings the specimen/ stage to just below the lens. It also brings the specimen into focus/ nearly into focus
ii) The fine adjusting knob brings the specimen into focus
c) They can use a higher-powered lens/ a lens with a greater magnification
d) The ruler allows the student to see the scale/ the size of the field of view
3)
a) Yes – we use unbroken lines
b) No – we do not shade/ colour in any areas on our sketch
c) We make our sketch as large as possible
d) Any 3 from:
- a title
- the magnification
- a scale
- labelling any key features
Questions
1) This question is all about preparing the specimen/ slide when we are using a light microscope.
a) When we are preparing the slide, why do we cut a thin slice of the specimen rather than a thick slice of the specimen?
b) Why would we add a stain to our specimen?
c) When we place the cover slip on our specimen, why do we need to make sure that we do not have any air bubbles?
2)
a) When we are looking at our specimen through a microscope, should we start with the lens that has the lowest magnification or the lens that has the highest magnification?
b) A student looks through the eyepiece of a microscope at the specimen.
i) What is the role of the coarse adjusting knob?
ii) What is the role of the fine adjusting knob?
c) What can the student do if they want to see the specimen with a greater magnification?
d) A student places a ruler on the stage. Why does she do this?
3)
a) When we are drawing our specimen, do we use unbroken lines; yes or no?
b) When we are drawing our specimen, do we shade/ colour in any areas; yes or no?
c) When we are drawing our specimen, should we make our drawing small or large?
d) What are 3 other things that we need to include on our sketch?
1) This question is all about preparing the specimen/ slide when we are using a light microscope.
a) When we are preparing the slide, why do we cut a thin slice of the specimen rather than a thick slice of the specimen?
b) Why would we add a stain to our specimen?
c) When we place the cover slip on our specimen, why do we need to make sure that we do not have any air bubbles?
2)
a) When we are looking at our specimen through a microscope, should we start with the lens that has the lowest magnification or the lens that has the highest magnification?
b) A student looks through the eyepiece of a microscope at the specimen.
i) What is the role of the coarse adjusting knob?
ii) What is the role of the fine adjusting knob?
c) What can the student do if they want to see the specimen with a greater magnification?
d) A student places a ruler on the stage. Why does she do this?
3)
a) When we are drawing our specimen, do we use unbroken lines; yes or no?
b) When we are drawing our specimen, do we shade/ colour in any areas; yes or no?
c) When we are drawing our specimen, should we make our drawing small or large?
d) What are 3 other things that we need to include on our sketch?