Light microscope , a microscope that shines light through a specimen and magnifies it using glass lenses., Specimen, the sample or object being observed under the microscope., Eyepiece , the part you look through; it magnifies the image of the sample., Objective lens , the lens above the stage that also magnifies the image., Stage, the platform where the slide is placed., Coarse focus knob, used to bring the sample into focus., Fine focus knob, used to sharpen the image further, Magnification , how many times bigger the image appears than the actual object., Slide, a thin piece of glass used to hold the specimen, Cover-slip , a thin glass cover placed over the specimen on the slide to protect it and flatten it., Stain, a liquid used to make cell structures easier to see., Iodine stain, used to stain onion cells; it makes the cell wall and nucleus darker., Methylene blue, used to stain cheek cells; it makes the nucleus darker blue..

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