Brainpop: Microscopes

Which of the following is an example of a concave structure?

• Mountain peak

• Hill

• Volcano top

• Plateau

Why does a microscope stage have a small hole in

it?

• To hold the specimen in place

• To secure slides to the stage

• To allow light to pass through

• To prevent slides from sticking to the stage

Why are specimens usually very thin slices of material? Choose the best answer.

• The thinness allows light to pass through, which

  makes the specimen visible.

• Thick objects cannot fit on microscope stages.

• Thick objects do not have to be magnified—they can

  be observed with the naked eye.

• The thinness makes individual atoms easier to see.

Which part(s) of a microscope forms an enlarged

image of a specimens?

• The light source

• The focus knobs

• The stage

• The objective lenses

If a specimen appears extremely blurry, what should

you do first? Choose the best answer.

• Adjust the fine focus knob

• Adjust the coarse focus knob

• Adjust the ocular lenses

• Move the slide around the stage

"Slides are made of translucent material, like plastic

or glass." What does "translucent" mean in the

preceding phrase?

• That light can pass through them

• That they reflect light

• That they magnify light

• That they are shatter-proof

What can you infer about these

two parts of a microscope?

• They are lightweight

• They contain mirrors and lenses

• They are strong and sturdy

• They are made from glass or plastic

Why is Anton van Leeuwenhoek considered the

"father of microscopy?"

• He was the first person to observe an animal cell

  through a microscope.

• He invented the first microscope.

• He was the best microscope-maker of his time.

• He published an instruction book on how to make

  microscopes.

Why can electron microscopes magnify smaller

objects than optical microscopes?

• Electrons are much smaller than protons

• Electron microscopes have bigger stages than optical

  microscopes

• Electron wavelengths are smaller than visible light

  wavelengths

• Electron microscopes have bigger lenses than optical

  microscopes

What can you infer about scanning probe

microscopes?

• They were among the first microscopes to be

  invented

• They are commonly found in junior high school

  biology labs

• They are a relatively recent invention

• They use extremely powerful light sources