Required practical: microscopes

Question 1

Objective lenses

Answer 1

Have difference magnifications to change the magnification of the image
Can switch them out

Question 2

Eyepiece

Answer 2

Where you look through

Question 3

Eyepiece lens

Answer 3

Inside the eyepiece
Has a Magnification of 10x

Question 4

Step 1

Answer 4

Place the slide with sample onto stage
Clips into place

Question 5

Step 2

Answer 5

Select lowest magnification objective lens

Question 6

Step 3

Answer 6

Slowly turn coarse focussing dial to move the stage up closer to the lens until almost touching
Observing from the side not the eyepiece lens

Question 7

Step 4

Answer 7

Look through the eyepiece
Adjust coarse focusing dial until it’s in focus by moving the stage away

Question 8

Step 5

Answer 8

Use fine focussing dial to bring the cells into a clear focus

Question 9

Step 6 (calculating total magnification)

Answer 9

Multiply the objective lens magnification
by the eyepiece magnification (usually 10)

Question 10

Step 7

Answer 10

Place ruler on stage
View it through the eyepiece and measure diameter to find magnification scale

Question 11

Stage

Answer 11

Where you place microscope slide
Has clips to hold slide in place

Question 12

Lamp

Answer 12

Light from it passes up through slide

Question 13

Mirror

Answer 13

Reflect light up through the slide

Question 14

Coarse focusing dial

Answer 14

Moves stage closer to the objective lens

Question 15

Light microscopes

Answer 15

Type that uses light to view cells
Smaller and more portable

Question 16

Light microscope disadvantages

Answer 16

Limited magnification
Limited resolution = image is blurred