microscopes

• What are the different units of length mentioned in the video?

  Nanometers, micrometers, millimeters, meters, and kilometers
• Why do we use different units of length?

  Each unit is 1,000 times bigger or smaller than the one next to it
• How do you convert kilometers to meters?

  By multiplying the number of kilometers by 1,000
• What happens to the numerical value when converting from a smaller unit to a larger unit?

  The numerical value decreases while the overall value remains the same
• What is the conversion of 6 millimeters to meters?

  0.006 meters or $6 \times 10^{-3} \text{ meters}$
• How do you convert 6 millimeters to kilometers?

  By dividing 0.006 by 1,000 to get $6 \times 10^{-6} \text{ kilometers}$
• How do you convert 6 millimeters to micrometers?

  By multiplying 6 by 1,000 to get $6 \times 10^{3} \text{ micrometers}$
• What is the conversion of 6 millimeters to nanometers?

  By multiplying 6 by 1,000 twice to get $6 \times 10^{6} \text{ nanometers}$
• How do you convert 340 nanometers to millimeters?

  By dividing by 1,000 twice, first to micrometers and then to millimeters
• What is the conversion of 340 nanometers to micrometers?

  0.34 micrometers
• What is the conversion of 340 nanometers to millimeters?

  0.00034 millimeters or $3.4 \times 10^{-4} \text{ millimeters}$
• What are the sizes of some common objects in relation to nanometers and micrometers?

  • Atoms: 0.1 to 0.5 nanometers
  • Molecules (e.g., glucose): ~1 nanometer
  • Viruses: ~100 nanometers
  • Small cells (e.g., bacteria): ~1 micrometer
  • Most animal and plant cells: 10 to 100 micrometers
  • Human hair: ~100 micrometers wide
• What is the smallest size visible to the naked human eye?

  About 100 micrometers
• What is the resolution limit of an electron microscope?

  About 0.1 nanometers
• How do you convert centimeters to other units?

  • 1 centimeter = 10 millimeters
  • 1 meter = 100 centimeters
  • To convert from centimeters to meters: divide by 100
  • To convert from centimeters to millimeters: multiply by 10
• How do you convert 30 centimeters to nanometers?

  By multiplying by 10 to get 300 millimeters, then by 1,000 to get 300,000 micrometers, and then by 1,000 again to get $3 \times 10^{8} \text{ nanometers}$
• What is the final conversion of 30 centimeters to nanometers?

  $3 \times 10^{8} \text{ nanometers}$
• What should you do if given centimeters in a question?

  • Multiply by 10 to convert to millimeters
  • Then convert to the desired unit from millimeters
• What is the purpose of the video mentioned in the study material?

  To help understand different units of length and how to convert between them
• What is the main focus of the video regarding tiny things?

  To provide context on the size of atoms and cells
• What is the significance of the scale mentioned in the video?

  It helps visualize the relative sizes of different units of length
• How does the video suggest handling conversions between non-adjacent units?

  By converting through adjacent units step by step
• What type of microscope is commonly used in classrooms?

  Light microscope
• What is a key advantage of light microscopes?

  They are small, easy to use, and relatively cheap
• What is the resolution limit of light microscopes?

  0.2 micrometers
• Why do light microscopes struggle to study subcellular structures?

  Because their resolution is limited to 0.2 micrometers
• What are examples of subcellular structures that light microscopes cannot adequately study?

  Mitochondria
• What is a key characteristic of electron microscopes?

  They are large, expensive, and hard to use
• What is the benefit of using electrons in electron microscopes?

  Electrons have a wavelength of just 0.1 nanometers, allowing for higher resolution
• What is the maximum resolution of electron microscopes?

  0.1 nanometers
• How much better is the resolution of electron microscopes compared to light microscopes?

  Electron microscopes have 2000 times better resolution than light microscopes
• What does a smaller resolution value indicate?

  A smaller value means you can see tinier details
• What type of microscope would you use to study mitochondria?

  Electron microscope
• What can be observed clearly with an electron microscope in a cell?

  The nucleus and mitochondria
• What are the pros and cons of light and electron microscopes?

  Light Microscopes:

  • Pros: Small, easy to use, relatively cheap
  • Cons: Limited resolution (0.2 micrometers), not suitable for subcellular structures

  
  

  Electron Microscopes:

  • Pros: High resolution (0.1 nanometers), can study subcellular structures
  • Cons: Large, expensive, hard to use
• Where can you find practice questions related to microscopes?

  On the website linked in the video description