cell biology: size of cells

• What prefixes should you be able to use after watching the video?

  CTI, milli, micro, and nano
• What types of cells were compared in the last video?

  Eukaryotic cells and prokaryotic cells
• What is a key difference between prokaryotic and eukaryotic cells?

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

  The meter
• Why are objects in biology often measured in smaller units than meters?

  Because they are often much smaller than a meter
• What is the average length of a German shepherd?

  Around 1 meter
• What does the prefix "centi" mean?

  It means one hundredth
• How many centimeters are in 1 meter?

  100 centimeters
• What is the standard form representation of 1 centimeter?

  1 cm is \(1 \times 10^{-2}\) m
• What is the width of a little finger approximately?

  Around 1 centimeter
• What does the prefix "milli" mean?

  It means one thousandth
• How many millimeters are in 1 centimeter?

  10 millimeters
• What is the standard form representation of 1 millimeter?

  1 mm is \(1 \times 10^{-3}\) m
• How long is a dog in millimeters if it is 1 meter long?

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

  It means one millionth
• How many micrometers are in 1 meter?

  1,000,000 micrometers
• What is the standard form representation of 1 micrometer?

  1 micrometer is \(1 \times 10^{-6}\) m
• What is the typical size range of a human cell?

  Around 10 to 20 micrometers
• What does the prefix "nano" mean?

  It means one billionth
• How many nanometers are in 1 meter?

  1,000,000,000 nanometers
• What is the standard form representation of 1 nanometer?

  1 nanometer is \(1 \times 10^{-9}\) m
• How large is a molecule of hemoglobin?

  Around 5 nanometers in diameter
• What are the prefixes used to describe sizes in biology?

  • Centi (1/100)
  • Milli (1/1000)
  • Micro (1/1,000,000)
  • Nano (1/1,000,000,000)
• How do the sizes of cells compare to the sizes of everyday objects?

  • Cells are often much smaller than everyday objects
  • Standard units like centimeters and millimeters are used for biological measurements
  • Micrometers and nanometers are necessary for measuring cells and their components