2. Heat
SEE ANIMATION
Heat is the amount of
thermal energy that is
transferred from one
body or system to
another, due to a
difference in
temperature.
Heat is energy in transit.

3. Heat measurement
1 J = 0.24 cal
Units of heat:
joules (J)
calories (cal)
Heat is measured in units
of joules or calories.
1 cal = 4.186 J