Engage: Have students complete word search before class starts.
Engage: Who is this man? Have students guess in the chat box.
Standard - 3.1.10.A8:Investigate the spatial relationships of organisms’ anatomical features using specimens, models, or computerprograms.3.1.6.A4 Recognize that all organisms are composed of cells and that many organisms are unicellularand must carry out all life functions in one cell.3.1.6.A9 Use appropriate tools and technologies to gather, analyze, and interpret data and understand that it enhances accuracy and allows scientists to analyze and quantify results of investigations.
Guided Learning:Set the timer to 30 seconds and let students write on the white board.
Guided Learning:Place students in the breakout rooms. Have students work together to move the moveable words on the next page to the correct part.
Practice:Place students in a breakout room for 1-1:30 min to calculate total magnification.10 x 40 = 400x total magnification
DO IF YOU HAVE TIME!Practice:Have students answer the pre-lab questions together:http://www.udel.edu/Biology/ketcham/microscope/4xCourse adjustmentFine adjustmentSwitch viewsYesWithin the circle shown on the screen.
Guided Learning:Application Share the lab report that shows the next steps of the lab. Remind students to remember to look for the answers to the post lab questions as the complete the lab. Do the first slide together and then send to breakout rooms to work as group on rest of lab.
Have student volunteer read the questions.
Practice and Assessment:Go to the website and follow through the checklist provided on the lab report. Give a student control of the application to go through each step. Switch students with each step.
Extension: matching parts of the microscopeAdd animated microscope GIF
Assessment:Students submit completed microscope lab. Have students place the function of the course adjustment in dropbox to earn participation points.
Hans and Zacharias Janssenshare a father, and a sonrelationship; Hans being thefather, and Zacharias being theson. These men are Dutch andthey are known for building thefirst compound microscope. It ismostly believed that Zachariaswas the first man to build themicroscope, but he was at such ayoung age when the compoundmicroscope was discovered, thatmost historians agree that hisfather, Hans had a significant rolein the creation of the compoundmicroscope. The microscope wascreated in the year 1590.
Essential Question: How do scientistsuse microscopes to view small livingand non-living objects?Goals:• Identify the parts of a microscope and describe their functions.• Observe prepared slides under a microscope.• Focus a virtual microscope by following step by step instructions.
Name parts of the microscope!Let’s see how many parts you can name in 30 seconds!
FUNCTIONS!!! A. the lens at the top that you look1. Fine Focus through. They are usually 10X or 15X power.2. Course Focus B. rotating disk under the stage that controls light going through specimen3. Diaphragm C. For focusing under low magnification4. Objective D. The shortest lens is the lowest power, the longest one is the lens with the lenses greatest power (4X, 10X, 40X and 100X powers)5. Eye piece E. For focusing under high magnifaction
DO NOW!• Answer the question below in your team! Be sure to write your answer on the whiteboard.If your eye eyepiece lens is 10x and your objective lens is 40x, what is the TOTAL MAGNIFICATION of the object you are viewing under your microscope?
1.10 Virtual Microscope Lab• Your lab report is found in Doc Sharing under Modified Labs.• Yesterday, you should have answered your pre- lab questions for homework.
Pre-Lab QuestionsANSWER THESE QUESTIONS AS YOU FOLLOW THE TOUR!1. What objective lens power should you start with always? Circle the correct answer. 4x (scanning lens) 10x(low power) 40x(high power)2. Which focus knob moves the stage quickly?3. Which focus knob moves the stage slowly?4. Which button do you press to look through the virtual microscope?5. Were you able to adjust the ocular lenses so you merged the two circles?6. Where should the center of the specimen be?
Let’s PracticeFocusing the Virtual Microscope!Remember to look at the Post Labquestions before you start so you can look for answers as you go.
Lab Questions1. How did the letter “e” appear under the microscope?2. Describe what the onion root tip looks like under the 40x lens.3. Describe what the bacterial capsule looks like under the 10x lens.4. Describe what the cheek smear looks like under the 40 x lens.
1. Turn on microscope light 2. Move the rheostat to 10 (light brightness) 3. Choose the slide in upper right hand corner. 4. Make sure scanning lens is in place (4x) 5. Center the specimen on the stage using the knobs on the right hand side (top) of the microscope. 6. Move stage to top position using the knobs on right hand side (bottom). 7. Click on “switch views” at top of checklist. 8. Adjust the ocular lenses using the eyepieces at top by dragging until circles overlap. 9. Using the course adjustment, focus the specimen.10. Then use the fine adjustment to focus more precisely. (The red circle will be focused)11. Adjust lighting using iris diaphragm if needed (so check appears).12. Change between the four objective lenses using the rotating nosepiece in bottom left corner.13. Once finished with this slide, move on to next slide by switching views.
ExtensionParts of the Microscope:http://www.quia.com/quiz/1480383.html?AP_rand=216640 179
Your TO DO list:1. Complete Microscope lab and put in dropbox.2. Read lesson 1.11 and take notes on guide3. Session tomorrow atTODAY’S PARTICIPATION 9/19/11:To earn your points for today, please place the function of the course adjustment in the dropbox labeled Participation 9/19-9/23.