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Warm-Up #12 9/6/12 1) To calculate the total magnification, you must multiple what two things? 2) What are the 3 types of microscopes? 3) When 1st looking at a slide, what power should be on and where should the stage be? 4) What is another name for low power? 5) What part of the microscope holds the objectives and rotates 360 degrees?
Quiz Study Guide • Types of microscopes • Calculate total magnification • 15 parts of the microscope • Function of the 15 parts • What the microscope should look like when you 1st look at a slide • How you carry a microscope
Match the number on the Microscope picture with the words provided. Arm____ Eyepiece_____ Nosepiece_____ Stage______ Diaphragm______ What is the total magnification of medium (10x) objective? Warm-Up #11 9/5/12
1) Arm = # 3 2) Eyepiece = # 1 3) Nosepiece = # 4 4) Stage = # 9 5) Medium power total magnification = 10 (objective) x 10 (eyepiece)= 100x
Essential Question: Would discoveries have been made if the microscope was not invented? Objectives: Demonstrate the proper use of the microscope Illustrate the parts of the microscope Things to Know…
Compound Light Microscope Light passes through a specimen and uses two lenses to form an image
Slide--8 Stage--9 Coarse adjustment--10 Diaphragm--11 Light source--12 Fine adjustment--13 Power switch--14 Base--15 Eyepiece--1 Body tube--2 Arm--3 Nosepiece--4 Stage clips--5 Objectives--6 Stage stop--7
Eyepiece: Always 10X Where you look through to see the image of your specimen Body Tube Long tube that holds the eyepiece and connects it to the objectives Parts of the Microscope
3. Arm: Part of the microscope that you carry the microscope with Nosepiece: Rotating part of the microscope at the bottom of the body tube; it holds the objectives. Parts of the Microscope
5. Stage Clips: Shiny, clips on top of the stage which hold the slide in place 6. Objectives: Low, medium, high, oil immersion Helps magnify the image Vary in length (the shortest is the lowest power or magnification; the longest is the highest power or magnification). Parts of the Microscope
Objectives 4x objective—lowest power 4 x 10 = 40 x magnification Scanning objective 10x objective—medium power 10 x 10 = 100 x magnification 40x objective—high power 40 x 10 = 400 x magnification Objective X (eyepiece) = total magnification
Stage Stop: Stops the stage Slide: Glass or plastic where specimen is placed Parts of the Microscope
Stage: *Stage starts all the way up when first looking, then slowly moves down Large, flat area under the objectives; it has a hole in it (see aperture) that allows light through; the specimen/slide is placed on the stage for viewing. Parts of the Microscope
Parts of the Microscope • Coarse Adjustment: • Large, round knob on the side of the microscope used for focusing the specimen; it may move either the stage or the upper part of the microscope
Diaphragm: Controls the amount of light going through the aperture 12. Light Source: Source of light usually found near the base of the microscope; the light source makes the specimen easier to see Parts of the Microscope
13. Fine Adjustment: Small, round knob on the side of the microscope used to fine-tune the focus of your specimen after using the coarse adjustment knob 14. Power Switch: Turns it on and off Parts of the Microscope
Base: Hold the components to the microscope Parts of the Microscope
Electron Microscope Focuses beams of electrons onto a specimen to form an image
Microscope Lab • Fill out the magnification table (other = medium) • Then look at the “e” slide in low power and medium power, then draw it • Look at one of the other slides • Answer the questions on back DO NOT WRITE ON MY PAPER!!!
Describe what each symbol means and what you should do when you see it. 1) 2) 3) 4) Warm-Up #5 8/22/11
Poison / Wear protective clothing and gloves No Open Flame / Use electric burner instead of a flame 3) Toxic Fumes / Wear a mask, ventilate area 4) Wear safety goggles
Warm-Up #10 9/3/12 1) Which is bigger : 56 cm or 6 m ? 2) Which is bigger: 33 kL or 500,000 mL? 3) How should you always carry a microscope? 4) What is the purpose of a microscope? 5) What type of microscope do we have at school?