2. Microscopes

Front

What is the formula for calculating the magnification of a microscope?

Back

Magnification = eyepiece lens x objective lens

Front

What is the formula for calculating the magnification of a drawing or photograph?

Back

M=I/A

Front

What do you use to view cells more clearly under the microscope?

Back

A stain

Front

What is the advantage of using a light microscope over an electron microscope?

Back

Can view living cells

Front

What is a mounted needle used for when preparing a slide?

Back

To gently lower the cover slip onto the slide

Front

What is the advantage of using an electron microscope?

Back

Greater magnification and resolution

Front

A photograph of an onion cell measures 10mm (image size) The actual size of the cell is 0.5mm What is the magnification of the image?

Back

x 20

Front

A microscope has a total magnification of x200. If the eyepiece lens has the power of x5, what is the power of the objective lens?

Back

x40

Front

Is this an image obtained from a light or an electron microscope?

Back

Electron

Front

Identify the structure labelled A in this image of a cheek cell: Cell membrane, Chloroplast, Mitochondrion, Nucleus

Back

Nucleus