This biology lesson covers calculating the size of a specimen viewed under a microscope. It explains the formula for determining specimen size using the field of view and the number of cells seen. The lesson also details the use of different objective lenses and converting measurements from millimeters to micrometers. Additionally, it guides students on calculating magnification and finalizing their lab presentation, including titling their drawings and noting magnification.

What is the formula used to calculate the size of a specimen under a microscope?

• Size of image = Field of view + Number of cells

• Size of image = Field of view x Number of cells

• Size of image = Field of view / Number of cells

• Size of image = Number of cells / Field of view

What is the field of view for an objective lens with a magnification of 4x?

• 2.0 millimeters

• 1.8 millimeters

• 0.5 millimeters

• 4.5 millimeters

If you see 5 cells under the microscope, what is the size of each cell in millimeters using a field of view of 0.5 millimeters?

• 0.05 millimeters

• 1.0 millimeters

• 0.5 millimeters

• 0.1 millimeters

How many micrometers are there in one millimeter?

• 10000 micrometers

• 10 micrometers

• 1000 micrometers

• 100 micrometers

What is the size of the specimen in micrometers if the calculated size in millimeters is 0.1?

• 0.1 micrometers

• 10 micrometers

• 100 micrometers

• 1000 micrometers

What is the formula for calculating magnification?

• Magnification = Length of drawing x Size of specimen

• Magnification = Size of specimen / Length of drawing

• Magnification = Length of drawing + Size of specimen

• Magnification = Length of drawing / Size of specimen

If the length of the drawing is 9 cm, what is its equivalent in micrometers?

• 900 micrometers

• 9000 micrometers

• 90000 micrometers

• 900000 micrometers

What is the magnification if the length of the drawing is 90,000 micrometers and the size of the specimen is 100 micrometers?

• 9

• 90

• 900

• 9000

Why does magnification have no unit?

• Because it is measured in micrometers

• Because it is a ratio of two lengths

• Because it is a constant value

• Because it is a measurement of weight

What should be included in the title of your drawing after calculating magnification?

• The size of the specimen

• The name of the specimen and magnification

• The number of cells seen

• The field of view