Microscope and Practical work

Question 1

Name the 2 lens of a microscope.

Answer 1

EyepIece lens and objective lens

Question 2

Which lens cannot be altered?

Answer 2

eyepiece lens

Question 3

Which lens can be altered?

Answer 3

Objective lens

Question 4

What is th emagnifying power of the eyepiece lens?

Answer 4

10

Question 5

What are the magnifying powers of the objective lens?

Answer 5

4, 10, 40

Question 6

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?

Answer 6

400

Question 7

State the 4 steps of the method to make a slide of a cheek cell.

Answer 7

1. swab inside of cheek
2. smear cells onto microscope slide
3. ad methylene blue stain
4. carefuuly lower the cover slip

Question 8

State 4 steps of the method to make a slide of onion cells.

Answer 8

1. peel thin layer of onion cells
2. place on microscope slide
3. add iodine
4. lower coverslip carefully

Question 9

Why are stains used when preparing a slide?

Answer 9

To stain cells and make easier to see

Question 10

What should you use to lower coverslip onto slide and why?

Answer 10

Mounted needle. To prevent air bubbles

Question 11

What part of the microscope holds the slide/specimens ?

Answer 11

clips attach it to the stage

Question 12

When focusing a slide, what magnifying power should you start on- low, medium or high?

Answer 12

low power

Question 13

What is the term used to describe what you see down the microscope?

Answer 13

The field of view