Marvelous Marshmallow Ice Core Lab By Trygve BergMay 7, 2017May 29, 20178th Grade Science Photo credit: Anna McKee Anna McKee with brainstorming help from Heidi Roop, developed a lesson to help her 8th grade students understand ice cores and the evidence contained within, which tells us about the climate over the last 800,000 years. Save Save TweetPinShare0 Shares