GCSE Practical 1 Microscopy

Label the part of the microscope. What is part D?

• body

• foot

• objective lens

• turret

Label the part of the microscope. What is part F?

• stage

• stage clips

• body

• focus knob

The greater the ___________________, the smaller the field you are actually viewing.

• detail

• objective

• magnification

• body

The microscopes we used in class had three ________________ which allows different amounts of magnification.

• detail

• magnification

• objectives

• body

How many microns (µm)
= 1 mm?

• 1,000
• 1,000,000
• 10,000
• 100,000

To calculate magnification we use......

• image size x actual size
• image size ÷ actual size
• actual size ÷ image size

To calculate image size we use.....

• actual size x magnification
• magnification ÷ actual size
• actual size ÷ magnification

To calculate actual size we use.....

• image size ÷ magnification

• image size x magnification

• magnification ÷ image size

If the image measures 100 mm and the scale bar is is 50 µm, what is the magnification?

• 2,000 x
• 150 x
• 5,000 x
• 20 x

If a bacteria image measures 450 mm and the magnification is 15,000x, what is the actual size of the bacteria?

• 30 µm
• 0.3 µm
• 300 µm
• 3,000 µm