Answer:
A person eats one hard-boiled egg and digests the egg fully. During cellular respiration MOST of the Calories in the egg is converted to heat.
Thermal energy could be an answer
Enzymes act as catalysts that remain unmodified as they increase the rate of a chemical reaction.
Water cycle
sun
never
evaporation
transpiration
condensation
precipation
run-off
Al crossmultiplies with 2
S crossmultiplies with 3
Al2S3