Objective

• We will be able to identify part of a microscope (Goal 1).

Parts of the Microscope Parts of the Microscope and Their Functionand Their Function

On the next slide there is an On the next slide there is an image of a microscope, very image of a microscope, very

similar to the scopes we use in similar to the scopes we use in class. class.

Click on the boxes to see the Click on the boxes to see the name and function of each part of name and function of each part of

the microscope.the microscope.

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

#9 Ocular Lense—The part you look at with your eye. Usually 10 X magnification.

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Click Here to Return to the Main Slide

#10 Arm – Used to safely transport microscope

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#11 Stage – Slides are placed on this

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#12 Coarse Adjustment – Used to make large changes in focus. NOTE Never use this when viewing on high power

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#13 Fine Adjustment – Used to make small adjustments of focus

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#14 Base – Used to safely transport the microscope

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#1 Tube – Reflects light up to the viewers eye

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#2 Revolving Nosepiece – Allows for quick change of objectives

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#3 Low Power Objective – The first lens you use when doing proper microscope work. Usually 4 X

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#4 Medium Power Objective – The second lens you use when doing proper microscope work. Usually 10 X

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#5 High Power Objective – The highest magnification used. Usually 43 X. NEVER use the course adjustment when using this lens.

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#6 Stage Clips – Use to keep the slide in place.

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#7 Diaphragm – Use to vary the amount of light passing through the slide. Usually it is better if the amount of light is low.

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#8 Light Source – Sends light up through the diaphragm and through the slide for viewing

Images Produced by Light Microscopes

Amoeba Streptococcus bacteria Anthrax bacteria

Human cheek cells Plant cells Yeast cells

Microscope Magnification• The ocular lens has a magnification of 10x• The objective lenses have magnifications of:

– Low: 4x– Medium: 10x– High: 40x

• To find the total magnification: Ocular lens x Objective lens– Example: ocular lens x high power = total magnification

10 x 40 = 400 (total magnification)

How to Carry a Microscope

• ALWAYS carry with the ARM and BASE

REMINDERS

• REMEMBER: All specimens must be thin for LIGHT to shine through them, otherwise they cannot be viewed clearly.

• REMEMBER: DO NOT use the COARSE adjustment knob when focusing on medium and high power objectives!! This could damage the objective and possibly break the slides and cover slips. If you cannot get it in focus, you should use the FINE ADJUSTMENT KNOB.

Whiteboard Challenge Rules

• Quickly record your answer to the questions

• Do not shout out or share answers

• When I say “Boards Up,” flip answers to the front

Name this part

ARM

What is the total magnification if the LOW power objective is bring

used?

40

What two parts of the microscope should be used to while carrying the

microscope?

ARM and BASE

Which adjustment knob is used to make small adjustments?

FINE ADJUSTMENT KNOB

Which adjustment knob should NEVER be used when using the high power

objective?

COARSE ADJUSTMENT KNOB

What part of the microscope holds the slide in place?

STAGE CLIPS

Microscope Lab

Follow Careful Directions!!!

• We will be viewing:– The letter ‘e’ under a microscope

Microscope & STERNGRR Scavenger Hunt

Exit Ticket

Silently and Independently complete your Exit Ticket

HW: Scientific Method Study Guide (last page of packet)