WONDER #1246: Can the Sun Help To Kill Germs?

Question 1 of 3

What type of light from the Sun can kill more than 99% of germs?

  1. visible
  2. ultraviolet
  3. radioactive
  4. infrared

Question 2 of 3

Ultraviolet light can be effective in killing germs if it causes mutations in what?

  1. the atmosphere
  2. the cell membrane of germs
  3. the DNA of germs
  4. the Earth\'s surface

Question 3 of 3

What wavelength of ultraviolet light is most effective at killing germs?

  1. 254 nanometers
  2. 54 nanometers
  3. 154 nanometers
  4. 452 nanometers

Check your answers online at https://www.wonderopolis.org/wonder/can-the-sun-help-to-kill-germs.