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T. Trimpe 2008 http://sciencespot.net/ Challenge #1 Parts of the Microscope

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Label the parts of the microscope Eye Piece/Ocular lens Diaphragm Objectives Nosepiece Fine Adjustment Knob Coarse Adjustment Knob A B C D E F

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The answers are … A B C D E F Eye Piece Ocular Lens Diaphragm Objectives Nosepiece Fine Adjustment Knob Coarse Adjustment Knob

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T. Trimpe 2008 http://sciencespot.net/ Challenge #2 Parts of the Microscope

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Arm Body Tube Coarse Adjustment Diaphragm Fine Adjustment Objective Lenses Eye Piece Stage A D B F E C G H Identify the parts of a microscope.

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A D B F E C G H The answers are... A. Body Tube E. Arm B. Objective Lenses C. Diaphragm D. Eye Piece G. Coarse Adjustment F. Stage H. Fine Adjustment

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T. Trimpe 2008 http://sciencespot.net/ Challenge #3 What do you know about microscopes?

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Answer these questions based on your knowledge of microscopes. 1. If you have three objectives – 10X, 30X, and 40X, which one has the lowest power of magnification? 2. Which of these images would be taken with a high power objective? 3. How does your view of a specimen change as you increase your power of magnification?

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1. If you have three objectives – 10X, 30X, and 40X, which one has the lowest power of magnification? 2. Which of these images would be taken with a high power objective? 3. How does your view of a specimen change as you increase your power of magnification? The answers are … 10X HIGH POWER You are able to see the specimen in more detail, but you cannot see as much of it.

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T. Trimpe 2008 http://sciencespot.net/ Challenge #4 What do you know about microscopes?

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Answer these questions based on your knowledge of microscopes. 4. Where should you hold on to the microscope when you carry it? 5. What is the scientific term for the eyepiece? 6. If the ocular lens has a power of 4X and the objective you are using has a power of 10X, what is your power of magnification? 7. What is the function of the diaphragm?

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The answers are … 4. Where should you hold on to the microscope when you carry it? 5. What is the scientific term for the eyepiece? 6. If the ocular lens has a power of 4X and the objective you are using has a power of 10X, what is your power of magnification? 7. What is the function of the diaphragm? Arm & Base Ocular Lens 4X x 10X = 40X It regulates the amount of light that passes through the specimen.

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T. Trimpe 2008 http://sciencespot.net/ Challenge #5 What do you know about microscopes?

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8. What part regulates the amount of light on a specimen? 9. If the eyepiece has a power of 12X and the objective has a power of 10X, what is the power of magnification? 10. What part of the microscope holds the objective lenses? 11. What part allows you to make small changes in your view of a specimen? Answer each question about microscopes.

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8. What part regulates the amount of light on a specimen? 9. If the eyepiece has a power of 12X and the objective has a power of 10X, what is the power of magnification? 10. What part of the microscope holds the objective lenses? 11. What part allows you to make small changes in your view of a specimen? The answers are … Diaphragm 12X x 10X = 120X Nosepiece Fine adjustment knob

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T. Trimpe 2008 http://sciencespot.net/ Challenge #6 Powers of Magnification

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Fill in the missing information in the chart based on your knowledge of powers of magnification. Ocular Lens Objective Lens Power of Magnification 520 10400 10120 A B C

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Ocular Lens Objective Lens Power of Magnification 520 10400 10120 The answers are … A B C 100 40 12 X=

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Do you know the critters you see in pond water? T. Trimpe 2008 http://sciencespot.net/

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Identify each pond water critter. Place the correct number next to each name Mosquito Larva_____ Dragonfly Nymph____ Damselfly Nymph____ Mayfly Nymph____ Nematode_____ Water Flea_____ Rotifer_____

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The answers are... Mosquito Larva Dragonfly Nymph Rotifer Damselfly Nymph Nematode Water Flea Mayfly Nymph

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