bear.png source=http://openclipart.org/people/lemmling/lemmling_Cartoon_bear.svg author=lemmling license=http://creativecommons.org

boreholeDrill.png source=http://openclipart.org author=Machovka license=http://creativecommons.org

boreholeDrillOnButton.png source=PhET author=pixelzoom

boreholeDrillOffButton.png source=PhET author=pixelzoom

glacialBudgetMeter.png source=PhET author=Archie Paulson

glacierPicture.png source=http://www.earthscienceworld.org/images/search/index.html author=Bruce Molnia license=author's permission

gpsReceiver.png source=PhET author=Archie Paulson

mountains.png source=PhET author=Archie Paulson

snowflake.png source=http://commons.wikimedia.org/wiki/Image:Snowflake.svg author=US DOT  license=public domain

thermometer.png source=PhET author=Archie Paulson

Tonsina_Glacier.jpg source=http://www.earthscienceworld.org/images,idU+003Diam8mh author=Bruce Molnia, Terra Photographics license=Used with permission, non-profit and commercial, see Unfuddle 1010 notes=U+003D is unicode for the equals sign

tracerFlag.png source=PHET author=Archie Paulson

trashCan.png source=http://openclipart.org author=? license=http://creativecommons.org