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bio lab quiz3 evy
quiz 3 microscope
| Question | Answer |
|---|---|
| what is the magnification of the short objective lens | 4x |
| what is the magnification of the medium objective lens | 10x |
| what is the magnification of the long objective lens | 40x |
| What is the magnification of the ocular lens (eyepiece)? | 10x |
| What is the total magnification of specimen using short + ocular lens? | 40x |
| What is the total magnification of specimen using medium + ocular lens? | 100x |
| What is the total magnification of specimen using long + ocular lens? | 400x |
| Which knob is larger? The coarse focus knob or the fine focus knob? | coarse focus, fine focus is smaller |
| If you move the stage to the left what happens | It goes right |
| If you move the stage away from you what happens | It moves up |
| What is absolutely necessary before you can change to a higher-power objective? | Centering the specimen. The more powerful the lens, the smaller are you see. |
| The area you can see at one time is called | The field of view |
| The higher the power of the objective the _______ the field of view | smaller |
| What should you never do if you are in high power? | do not move the stage |
| What are the two types of slides? | dry mount -permanent wet mount- temporary |
| 2 things before starting with microscope, what are they? | always start with scanning objective lens, move stage all the way up |
| what should you start out touching first the coarse or the fine focus knob? | the coarse focusing knob |
| ocular lens (eye piece) allows you to view the specimen; magnifies image | 10 x; contains pointer |
| stage | holds the specimen; has a mechanism to move the slide around |
| condenser lens | focuses light on the specimen |
| nose piece | revolves to change objective |
| Scanning lens 4x | objective lens used to first locate a specimen |
| Iris diaphragm | regulates the amount of light that passes through the specimen |
| Fine focus knob | Moves objective lenses in small increments for small adjustments in image clarity |
| scanning lens 4x | objective lens with the lowest magnifying power |
| High power 40x | objective lens with the highest magnifying power |
| coarse focus knob | moves objective lenses rapidly in large increments for initial adjustment in image clarity |
| In the compound microscope, the image is viewed __________ and _________. | upside down and backward |
| The compound microscope has _______ magnification levels | fixed |
| Dissecting microscope is used to examine____ objects | larger |
| Compound microscope is used to examine____ specimines | smaller |
| Focusing knob moves the stage in this direction | lifts the stage up and down |
| What knob to change the image size? | magnification control knob |
| The eyepiece is called | ocular lens 10x |
| The revolving turret is called nosepiece, what is connected to the nosepiece | objective lens |
| shortest lens has the ___mag power | lowest |
| longest lens has the ____ mag power | longest |
| On both sides of the arm, you'll see the _____ knobs | focus |
| The larger ring (focus knob) is the _____ focus knob | coarse |
| The smaller ring (focus knob) is the _____ focus knob | fine |
| Two control knobs move the mechanical stage (one __ the other ___ | r/l, u/d |
| At the center of the stage, you ll see the glass of the condenser lens which does this | focuses light on the specimen |
| Directly above the light sourse, you see a lever that moves from left to right. This lever is connected to the ____ | Iris diaphragm (moves in opposite direction) |
| If you open the iris diaphragm so that you can see the light you do that through the | condenser lens |
| Lower the stage as low as it can go using the ______ focus knob | coarse |
| How do you move the mechanical stage to center a specipen | use the control knobs |
| how do you adjust the focus to make the image sharp and clear? | move the fine focus knob. |
| If the letter e isn't bright enough what do you do | adjust the iris diaphragm |
| the more powerful the lens the ___the area you see | smaller (but more detail)called the field of view |
| higher the power of the objective, the____ the field of view | smaller |
| if the image is not sharp and clear | gradually adjust the fine focus knob |
| if you need light | gradually adjust the iris diaphragm |
| cheek cells need this kind of light | low light-adjust the iris diaphragm |
| what do you drop ont he daphnea slide | methl cellulose |
| what lens did you use for the daphnea | 4x |
| with the cheek test what did you use | iodine saline meth blue |
Created by:
evykas70
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