A calorie is a unit of heat energy equal to the amount of heat needed to raise the temperature of one gram water one degree Celsius.
(A calorie; is; a unit of heat energy equal to the amount of heat) (the amount of heat; needed; to raise the temperature of one gram water one degree Celsius)
A calorie the amount of heat
is needed
a unit of heat energy equal to the amount of heat
to raise the temperature of one gram water one degree Celsius