sizes of cells

• What should you be able to describe by the end of the video?

  The size of cells
• What are the two types of cells discussed in the previous video?

  Eukaryotic and prokaryotic cells
• How do prokaryotic cells compare in size to eukaryotic cells?

  Prokaryotic cells are much smaller
• What is the standard unit of measurement in science?

  The meter
• How many centimeters are in 1 meter?

  100 centimeters
• What does the prefix "centi" mean?

  One hundredth
• What is the standard form of 1 centimeter?

  1 * 10^-2 meters
• How many millimeters are in 1 centimeter?

  10 millimeters
• What does the prefix "milli" mean?

  One thousandth
• What is the standard form of 1 millimeter?

  1 * 10^-3 meters
• How long is 1 meter in millimeters?

  1,000 millimeters
• What does the prefix "micro" mean?

  One millionth
• What is the standard form of 1 micrometer?

  1 * 10^-6 meters
• What is the typical size range of a human cell?

  Around 10 to 20 micrometers
• Why do biologists find micrometers useful?

  They are suitable for measuring cell sizes
• What is the smallest unit discussed for measuring sizes inside cells?

  Nanometer
• What does the prefix "nano" mean?

  One billionth
• What is the standard form of 1 nanometer?

  1 * 10^-9 meters
• What type of proteins are measured using nanometers?

  Proteins and cells
• What are the prefixes used for measuring small sizes in biology?

  • CTI: 100th
  • Milli: 1,000th
  • Micro: 1 millionth
  • Nano: 1 billionth
• What are the standard forms for the prefixes discussed?

  • 1 cm = 1 * 10^-2 m
  • 1 mm = 1 * 10^-3 m
  • 1 µm = 1 * 10^-6 m
  • 1 nm = 1 * 10^-9 m
• How do the sizes of eukaryotic and prokaryotic cells compare?

  • Eukaryotic cells: larger
  • Prokaryotic cells: smaller