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Rules for using the microscope. Carry with two hands Always start with low power.

Good afternoon future scientists, please work with your partner to complete the Measuring in SI worksheet. Do you know what is the fastest thing on earth? http://www.nsta.org/. Rules for using the microscope. Carry with two hands Always start with low power. Bring the stage up

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Rules for using the microscope. Carry with two hands Always start with low power.

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  1. Good afternoon future scientists, please work with your partner to complete the Measuring in SI worksheet. Do you know what is the fastest thing on earth? http://www.nsta.org/

  2. Rules for using the microscope. Carry with two hands Always start with low power. Bring the stage up Place specimen on the slide and cover with a cover slip

  3. This is a microscope slide. This is a cover slip.

  4. Part 2- The Microscope • Invented in the 1500s • Robert Hooke was the first to see cells • Anton van Leeuwenhock was the first to see living things

  5. Total Magnification Power • The power of the eyepiece lens X the power of the objective lens being used. • 10x X 40x = 400x

  6. International System (SI) of Measurement

  7. Advantages of the Metric System • Creates an international system of measurement that uses the same standards world wide • Ease of recording and calculating • All units are based on units of 10 • Very precise measurements can be recorded with decimals NOT fractions.

  8. Subdivisions can be divided again and again for more precision… .1 unit .01 unit .001 unit (Again by tenths)

  9. “Base” Units • Unit of Length- Meter • Based on the distance from the N. Pole to the equator • Unit of Volume- Liter • The space an object takes up (solid, liquid or gas) • Unit of Mass- Gram • The amount of matter in an object

  10. Metric prefixes can be placed in front of all metric units! • A. FROM KILO TO MILLI This prefix changes the base into a unit 100x larger This prefix changes the base into a unit 1000x larger Important prefixes to know: A prefix that makes a unit 10x larger than the base The base of any unit determined by what you are measuring KILO 1000x HECTA 100x This prefix changes the base into a unit 1/1000 as large as the base DECA 10x This prefix changes the base into a unit 1/100 as large as the base BASE UNIT This prefix changes the base into a unit 1/10 as large as the base DECI .1 CENTI .01 MILLI .001

  11. King Henry Died By Drinking Chocolate Milk KILO Come up with a sentence to order the prefixes! HECTA How are we going to remember these? DECA BASE UNIT DECI CENTI MILLI

  12. Metric Tools Balance – used to measure mass (grams) Graduated cylinders and beakers – used to measure volume(liters) Meter stick – used to measure length (meters)

  13. Microscope • Used to magnify objects and make small details more apparent. • Compound microscopes have two lenses that magnify the object. The eye piece and the objective lens. • Total magnification = eye piece X obj. lens • 3 objective lenses: 4x, 10x, 40x

  14. 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

  15. #9 Eye Piece—The part you look at with your eye. Usually 10 X magnification. Click Here to Return to the Main Slide

  16. #10 Arm – Used to safely transport microscope Click Here to Return to the Main Slide

  17. #11 Stage – Slides are placed on this Click Here to Return to the Main Slide

  18. #12 Coarse Adjustment – Used to make large changes in focus. NOTE Never use this when viewing on high power Click Here to Return to the Main Slide

  19. #13 Fine Adjustment – Used to make small adjustments of focus on high power Click Here to Return to the Main Slide

  20. #14 Base – Used to safely transport the microscope Click Here to Return to the Main Slide

  21. #1 Body Tube – Reflects light up to the viewers eye Click Here to Return to the Main Slide

  22. #2 Rotating Nose Piece – Allows for quick change of objectives Click Here to Return to the Main Slide

  23. #3 Low Power Objective – The first lens you use. 4 X Click Here to Return to the Main Slide

  24. #4 Medium Power Objective – The second lens you use. 10 X. Click Here to Return to the Main Slide

  25. #5 High Power Objective – The highest magnification used. 40 X. NEVER use the course adjustment when using this lens. Click Here to Return to the Main Slide

  26. #6 Stage Clips – Use to keep the slide in place. Click Here to Return to the Main Slide

  27. #7 Diaphragm – Use to vary the amount of light passing through the slide. Usually it is better if the amount of light is low. Click Here to Return to the Main Slide

  28. #8 Light Source – Sends light up through the diaphragm and through the slide for viewing Click Here to Return to the Main Slide

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