Mechanical energy from a saw cutting wood is transformed into heat, warming the saw blade. Electrical energy powering a light bulb is transformed into both light and heat. A television transforming electrical energy into radiant and sound energy also produces heat. Jogging in place transforms chemical energy into mechanical movement and heat. Energy transformations always release heat to surroundings, raising their temperature.

3. Direction: Read the statements. Write either
hot or heat on the blanks to make each
statement
correct.
1. Mechanical energy is present when a carpenter
cuts a piece of wood with a saw. After cutting the
wood, the blade of the saw feels _______.
2. In the case of the light bulb, while connecting
electrical energy to light, __________ is also
generated.

4. 3. In the process of changing electrical energy to
radiant and sound energy, the television produces
____________ .
4. You felt hot or warm after jogging for five minutes.
The chemical energy in your body was changed to
mechanical energy as you jogged in place. The
warmth you felt is evidence that ___________ was
generated.
5. Energy transformation releases _________ to the
surroundings. This heat is absorbed by the
surrounding materials causing it to raise its
temperature.