WONDER #1219: Why Is There So Much Foam in a Root Beer Float?

Question 1 of 3

Root beer gets its name from the fact that it was originally made from the root of which plant?

  1. sassafras
  2. sarsaparilla
  3. licorice
  4. ice cream

Question 2 of 3

Root beer floats foam up so much because what gas is released from the soda and then trapped by the fat molecules in the ice cream?

  1. oxygen
  2. nitrogen
  3. carbon dioxide
  4. nitrous oxide

Question 3 of 3

Root beer is believed to have been invented late in what century?

  1. 20th
  2. 21st
  3. 19th
  4. 18th

Check your answers online at https://www.wonderopolis.org/wonder/Why-Is-There-So-Much-Foam-in-a-Root-Beer-Float.