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

Question 1 of 3

<p class=\"FreeForm\"><span style=\"font-size: 10.0pt; font-family: \'Century Gothic\';\">What type of light from the Sun can kill more than 99% of germs?</span></p>

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

Question 2 of 3

<p class=\"FreeForm\"><span style=\"font-size: 10.0pt; font-family: \'Century Gothic\';\">Ultraviolet light can be effective in killing germs if it causes mutations in what?</span></p>

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

Question 3 of 3

<p class=\"FreeForm\"><span style=\"font-size: 10.0pt; font-family: \'Century Gothic\';\">What wavelength of ultraviolet light is most effective at killing germs?</span></p>

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

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