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Tools and Procedures 1.4
Metric System  Decimal system of measurement based on certain physical standards and scaled on multiples of 10.
Microscope  A device that produces magnified images of structures that are too small to see with the unaided eye.
Compound Light Microscope  A microscope that allows light to pass through a specimen and uses two lenses to form an image.
Electron Microscope  A microscope that forms an image by focusing beams of electrons onto a specimen.
Cell Culture  A group of cells grown in a nutrient solution from a single original cell.
Cell Fractionation  A technique in which cells are broken into pieces and the different cell parts are separated.
Key Concept What measurement system do scientists use? Most scientists use the metric system when collecting data and performing experiments. The metric system is a decimal system of measurement.
Key Concept How are light microscopes and electron microscopes similar? How are they different? Light microscopes produce magnified images by focusing visible light rays. Electron microscopes produce magnified images by focusing beams of electrons.

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Biology 1.4

  • 2. Metric System Decimal system of measurement based on certain physical standards and scaled on multiples of 10.
  • 3. Microscope A device that produces magnified images of structures that are too small to see with the unaided eye.
  • 4. Compound Light Microscope A microscope that allows light to pass through a specimen and uses two lenses to form an image.
  • 5. Electron Microscope A microscope that forms an image by focusing beams of electrons onto a specimen.
  • 6. Cell Culture A group of cells grown in a nutrient solution from a single original cell.
  • 7. Cell Fractionation A technique in which cells are broken into pieces and the different cell parts are separated.
  • 8. Key Concept What measurement system do scientists use? Most scientists use the metric system when collecting data and performing experiments. The metric system is a decimal system of measurement.
  • 9. Key Concept How are light microscopes and electron microscopes similar? How are they different? Light microscopes produce magnified images by focusing visible light rays. Electron microscopes produce magnified images by focusing beams of electrons.