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Name:__________________________ Microscope worksheet How long was the first microscope?__________ feet In the 1590’s the _______________ brothers created the first microscope. Two scientists that made improvements on the lenses of microscopes were ___________ ________ ___________________ & _____________ _____________. In 1665, Robert Hooke looked at a thin slice of ____________ and later coined the name cellulae or __________. In the early 1700’s Leeuwenhoek looked at_________ water and called the microscopic organisms “animalcules” In 1838, Matthius Schleiden stated all __________ are made of cells. Theodor Schwann stated all ____________ are made of cells. Robert Brown observed a _____________ in orchid cells. Iist the 3 parts to the cell theory: 1. ________ are the basic unit of life 2. All organisms are composed of _________________________. 3. All cells come from _______________ cells. Parts of the Microscope 1. The body tube holds the __________ lenses and the ____________ lens at the proper distance. 2. The Nose Piece holds the objective lenses and can be turned to change the ________________. 3. The ocular or eye lens magnifies the specimen image _____times. 4. The Objective Lenses increase magnification from ____x to ___x to ___x. 5. The 2 __________ clips hold the slide/specimen in place on the stage. 6. The Diaphragm controls the ___________ of _________ on the slide/specimen. 7. The light source projects light upwards through the diaphragm, the specimen and the lenses. Some have _________, and others have ___________ where you must move the mirror to reflect light. 8. The arm is used to ____________ the microscope when carried. 9. The ____________ supports the slide/specimen. 10. The ___________ adjustment knob moves the stage up and down (quickly) for focusing your image. Never use coarse adjustment under ___________ power. 11. The ________ ________________ knob moves the stage SLIGHTLY to sharpen the image. 12. The ____________ supports the microscope. Magnification: To determine your magnification…you just multiply the _________ or ____ lens by the __________ lens If the ocular lens is 10x & the objective lens is 40x. The total magnification = ______x. The convex lenses of a microscope works by ______________ light, making the object bigger. The hand lens magnifies up to ______ x and the stereo microscope up to _______ x. The stereo uses _______ ocular/eye lenses to enhance the specimen, which gives a ______ image. Electron Microscope Electron microscope uses electrons & can magnify up to ______________ x. Name the two types & function of Electron microscope: 1. 2. The Compound Light Microscope Ocular or eye lens Fine adjustment knob Arm Revolving nose piece Course adjustment knob Stage Objective lens Light source Body tube Diaphragm Stag clips Base