1. Key Concepts: Microscopy

Question 1

Study cells using Microscopes - what are they?

Answer 1

Lenses magnify image - increase resolution - higher the resolution means clearer the image and in more detail

Question 2

What are Light Microscopes? How do you use to view a specimen?

Answer 2

Light microscopes - invented in 1590s - light through specimen - see nuclei and chloroplasts - study living cells

Question 3

What are Electron Microscopes?

Answer 3

Electron microscopes - invented in 1930s - use electrons rather than light - higher magnification and resolution

Question 4

How do you create a Scientific Drawing of a Specimen?

Answer 4

Sharp pencil - outline main features using clear lines - drawing take up half space available - keep parts in proportion

Label important features - straight lines - include magnification used and a scale

Question 5

What is Magnification?

Answer 5

How many times the image is

If you don’t know which lens was used - workout magnification by measuring the image and know the real size of the specimen

Question 6

What is the Magnification equation?

Answer 6

Total magnification = eyepiece lens magnification x objective lens magnification

Magnification = image size / real size

Question 7

How do you work with numbers in Standard Form?

Answer 7

Move decimal point left or right

Number of places decimal point moves - represented by a power of 10

DIAGRAM OF UNITS ON PAGE 14