a thoughtful web.
Good ideas and conversation. No ads, no tracking.   Login or Take a Tour!
comment
user-inactivated  ·  3806 days ago  ·  link  ·    ·  parent  ·  post: Hubski Science Quiz #1 - updated with answer!

The jar will run out of oxygen before the CO2 gathers in the lower part of the jar. I'm going to say that both candles run out of O2 and extinguish at roughly the same time.