size of cell

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

  The meter
• What is the average length of a German shepherd in meters?

  Approximately 1 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 in meters?

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

  About 1 centimeter
• 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 in meters?

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

  1,000 millimeters
• What is a micrometer?

  A micrometer is one millionth of a meter
• What is the standard form of 1 micrometer in meters?

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

  10 to 20 micrometers
• Why do biologists find micrometers a useful unit?

  Because they are useful for measuring the size of cells
• What is the smallest unit discussed for measuring sizes inside cells?

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

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

  $1 \text{ nm} =$$1 \times 10^{-9} \text{ m}$
• How large is a molecule of hemoglobin in nanometers?

  Approximately 5 nanometers in diameter
• What is the significance of using nanometers in biology?

  They are used to measure proteins and other small structures in cells
• What are the prefixes used to describe sizes in biology?

  • CTI (centi): 1/100
  • Milli: 1/1000
  • Micro: 1/1,000,000
  • Nano: 1/1,000,000,000
• What are the key differences between eukaryotic and prokaryotic cells?

  • Eukaryotic cells: larger, complex, contain a nucleus (e.g., animal and plant cells)
  • Prokaryotic cells: smaller, simpler, lack a nucleus (e.g., bacteria)
• What are the standard forms for the different units of measurement discussed?

  • Centimeter: $1 \text{ cm} =$$1 \times 10^{-2} \text{ m}$
  • Millimeter: $1 \text{ mm} =$$1 \times 10^{-3} \text{ m}$
  • Micrometer: $1 \text{ µm} =$$1 \times 10^{-6} \text{ m}$
  • Nanometer: $1 \text{ nm} =$$1 \times 10^{-9} \text{ m}$
• What are the typical sizes of cells and their components?

  • Typical human cell: 10 to 20 micrometers
  • Molecule of hemoglobin: approximately 5 nanometers