B1 cell structure and transport 👄

Question 1

Label the microscope

Question 2

What do microscopes allow us to do

Answer 2

Magnify objects

Question 3

Disadvantages of light microscopes

Answer 3

1 Limited magnification
2 Limited resolution (image is blurry)

3 Not useful for exploring structures inside cells in detail

Question 4

Advantages of electron microscopes

Answer 4

1 Much greater magnification and resolution than light microscopes (resolution - ability to distinguish/ show great detail of a specimen or sample)

Question 5

Magnification equation ? And triangle ?

Answer 5

Size of image -divided by- size of real object

NOW PRACTICE MAGNIFICATION QUESTIONS

Question 6

Convert:
1 km - metres
1 mm - micro metres
1 um - nanometres

Answer 6

1km - 1000m
1 mm - 1000 micro metres

1 um - 1000 nanometres

Question 7

Use of light microscope and electron microscope

Answer 7

Light microscope- study living cells with low magnification and resolution

Electron microscope- study dead cells under high magnification and resolution

Question 8

Advantage of light microscope

Answer 8

Inexpensive to buy and operate

Relatively small

Question 9

Disadvantage of electron microscope

Answer 9

Quite large and bulky ( larger then light microscope)

Quite expensive

Lots of training requires to use them

Can only examine dead cells