Microscopes Core Practical - TIN

Which stain do you use when viewing onion cells under a microscope?

• Methylene Blue

• Iodine

Which stain do you use when viewing cheek cells under a microscope?

• Methylene Blue

• Iodine

Name the part of the microscope labelled number 5

• Eyepiece lens

• Objective lens

• Mirror

• Stage

Name the part of the microscope labelled number 3

• Eyepiece lens

• Focusing wheel

• Arm

• Stage

Name the part of the microscope labelled number 2

• Eyepiece lens

• Mirror

• Arm

• Stage

Name the part of the microscope labelled number 6

• Eyepiece lens

• Base

• Arm

• Objective lens

How can more detail be observed in cells?

• Use a better light source

• Use a higher magnification

• Use a larger microscope

• Use a lower magnification

Why is it necessary to carefully place the cover slip on top of the specimen on the glass slide? Choose two answers.

• To prevent air bubbles

• To prevent you from getting any stain on your hands

• To make your results more accurate

• To be able to see the cells

Using the image, select the correct statement below:

• Image = Actual/Magnification

  Actual = Image/Magnification

  Magnification = Image x Actual

• Image = Actual x Magnification

  Actual = Image x Magnification

  Magnification = Image/Actual

• Image = Actual x Magnification

  Actual = Image/Magnification

  Magnification = Image/Actual

• Image = Actual x Magnification

  Actual = Magnification/Image

  Magnification = Actual/Image

Total magnification =

• Objective lens/Eyepiece lens

• Objective lens x 100

• Eyepiece lens x Objective lens

• Eyepiece lens x 100