Microscope and Practical work
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Name the 2 lens of a microscope.
EyepIece lens and objective lens
Which lens cannot be altered?
eyepiece lens
Which lens can be altered?
Objective lens
What is th emagnifying power of the eyepiece lens?
10
What are the magnifying powers of the objective lens?
4, 10, 40
If the microscope you are using has an eye piece with x10 magnification and an objective lens of x40 magnification, what is the total magnification being used?
400
State the 4 steps of the method to make a slide of a cheek cell.
• swab inside of cheek • smear cells onto microscope slide • ad methylene blue stain • carefuuly lower the cover slip
State 4 steps of the method to make a slide of onion cells.
• peel thin layer of onion cells • place on microscope slide • add iodine • lower coverslip carefully
Why are stains used when preparing a slide?
To stain cells and make easier to see
What should you use to lower coverslip onto slide and why?
Mounted needle. To prevent air bubbles
What part of the microscope holds the slide/specimens ?
clips attach it to the stage
When focusing a slide, what magnifying power should you start on- low, medium or high?
low power
What is the term used to describe what you see down the microscope?
The field of view