How can an ice sculpture contain more heat energy than a lit match?
It's all a matter of mass. An ice sculpture contains 1 british thermal unit for each pound of ice and every 2.14 degrees Fahrenheit above absolute zero. a burning match gives off approximately 19000 btu per pound in heat energy as it burns. Thus the match, assuming it weighs 14 grains, will give off approximately 38 btus of heat energy until it is fully consumed; whereas a 100lb ice sculpture at 30 degrees fahrenheit contains in total heat energy approximately 20,000 btus more or less.
Temperature wise the match is hotter than the ice, but it would melt only a fraction of 1 lb of ice if all the energy were absorbed by the ice. (1 lb of ice requires 144 btus to melt at 32F).