Size of cells

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

  The size of cells
• What prefixes should you be able to use after watching the video?

  CTI, milli, micro, and nano
• Why might the material seem tricky?

  You may need to watch the video multiple times
• 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 is 1 meter divided to find centimeters?

  1 meter is divided into 100 equal parts
• What does the prefix "centi" mean?

  One hundredth
• How is 1 centimeter expressed in standard form?

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

  Around 1 centimeter
• How many millimeters are in 1 centimeter?

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

  One thousandth
• How is 1 millimeter expressed in standard form?

  1 mm is $1 \times 10^{-3} \text{ m}$
• What is the approximate size of the tip of a ballpoint pen?

  Around 1 millimeter
• How many millimeters are in 1 meter?

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

  One millionth
• How is 1 micrometer expressed in standard form?

  1 µm is $1 \times 10^{-6} \text{ m}$
• What is the typical size range of a human cell?

  10 to 20 micrometers
• Why are micrometers a useful unit for biologists?

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

  The nanometer
• What does the prefix "nano" mean?

  One billionth
• How is 1 nanometer expressed in standard form?

  1 nm is $1 \times 10^{-9} \text{ m}$
• What is the approximate diameter of a hemoglobin molecule?

  Around 5 nanometers
• What are the key prefixes used in measuring cell sizes?

  • Centi (1/100)
  • Milli (1/1000)
  • Micro (1/1,000,000)
  • Nano (1/1,000,000,000)
• How do the sizes of eukaryotic and prokaryotic cells compare?

  • Eukaryotic cells: larger, complex structures
  • Prokaryotic cells: smaller, simpler structures
• What are the standard forms for common biological measurements?

  • 1 cm = $1 \times 10^{-2} \text{ m}$
  • 1 mm = $1 \times 10^{-3} \text{ m}$
  • 1 µm = $1 \times 10^{-6} \text{ m}$
  • 1 nm = $1 \times 10^{-9} \text{ m}$
• What are the practical applications of understanding cell sizes?

  • Measuring cell dimensions
  • Understanding cellular structures
  • Analyzing microscopic organisms