•Energy cannot be created or destroyed, only changed in form. The total
energy in the universe is a constant.
•Energy measured in calories(cal) and joules (J).
•1 cal = 4.184 J and
is the amt of heat energy needed to
raise the temperature of 1 gram of water by 1 degree C.
•Food calorie = 1000 cal or Kcal (kilocalories)
