IB Magnification & Scale Bar Calculations - 4Hr

How many microns (µm)
= 1 mm?

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

How many nanometers (nm)
= 1 micron (µm)?

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

How many nanometers (nm)
= 1 mm?

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

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 scale bar measures 32 mm and it states it's length is 100 µm, what is the magnification?

• 320 x
• 3,200 x
• 0.32 x
• 32,000 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

An ant measures 2 mm in length.  If it is observed at 20x magnification, what length should the scale bar be drawn at?

• 40 mm
• 10 mm
• 4 mm
• 0.1 mm