Microscopes Flashcards Preview

Combined Sciences > Microscopes > Flashcards

Flashcards in Microscopes Deck (26)
Loading flashcards...
1
Q

Are atoms microscopic? Why?

A

No, because you can’t see them with a microscope, they’re too small

2
Q

What does it mean if something is biological?

A

It comes from a living thing

3
Q

Where is protein synthesis found?

A

In ribosomes

4
Q

What is the equation to work out the actual size of an image viewed through the microscope?

A

Actual size = image size / magnification

5
Q

What does image size mean?

A

Size of the picture (measure it)

6
Q

What is magnification?

A

How much bigger the image is than the actual size

7
Q

What is the equation to work out image size?

A

Image size = actual size x magnification

8
Q

What is the equation to work out magnification?

A

Magnification + image size / actual size

9
Q

What is resolution?

A

The smallest distance between two points that can be seen as two points

10
Q

Why do we stain specimen cells with iodine?

A

So we can see them more easily.

11
Q

What do we put before the magnification when writing magnification?

A

An x sign

12
Q

In a cells, where are the ribosomes usually found?

A

Near the nucleus

13
Q

Who created the light microscope?

A

Robert Hooke

14
Q

What was the magnification of Robert Hookes microscope?

A

X30

15
Q

If the magnification is x30, how much bigger will the image viewed be than actual size?

A

30 times

16
Q

What are the two types of lens in a modern light microscope?

A

Eyepiece lens and objective lens

17
Q

If an eyepiece lens has a magnification of x10 and the objective lens has a magnification of x4 what is the total magnification?

A

X40

18
Q

What is the field of view?

A

What you see through the microscope

19
Q

What do electron microscopes allow us to see?

A

Sub cellular structures

20
Q

What are micrographs?

A

Computer generated images from an electron microscope

21
Q

Four steps to using a microscope

A

1) Place the slide on the stage and look through the eyepiece lens
2) Make sure the smallest objective lens is on
3) Turn the focusing wheel to get a clear image
4) Increase the magnification of the objective lens

22
Q

On a microscope, how can we identify the objective lens?

A

The small red one

23
Q

On a microscope, how can we identify the focus wheel?

A

The big one

24
Q

How do we carry a microscope?

A

Keep one hand on base and one hand on grip

25
Q

Three simple steps to getting a specimen on a slide ready for viewing?

A

1) Place a drop of iodine solution on the slide
2) Place specimen on drop on the slide
3) Gently lower a coverslip onto the slide at a 45* angle

26
Q

What are three important rules to use when drawing a biological drawing?

A

Continuous lines - no sketching
Label lines don’t cross, no arrow heads, drawn with ruler
No shading or colouring