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1. Which of the following correctly identifies an SI unit and the tool that is used to measure it? meter; ruler ( I also think it's this answer) degrees Fahrenheit, thermometer gram; scale milliliter; meniscus 2. Why do scientists use standard units of measurement? A: because their tools only measure in these units B: because other units are either too small or too large to work with C: so they can communicate finding without confusion. ( I think it's this answer) D: so that people who are not scientist can understand them 3. How do light microscopes work? A: Light microscopes use an eletron beam to create an image of a specimen B: Light microscopes use a combination of light and lenses to magnify a specimen ( I think this is the answer) C: Light microscopes use a tiny tip that traces a specimen englarging it. D: Light microscopes use a laser light to scan a specimen and send data to a computer to create an image. (But I also think it's this one)