1. Energy and Heat Transfer

2. What Is Energy? Definition—The ability to do work. Types of energy
Mechanical
Chemical
Electrical
Radiant
Nuclear
A Energy

3. Mechanical Energy What makes a machine to perform work.
Examples include:
Hand mixers
Water wheel
Flour mill
A Energy

4. Chemical Energy
As bonds break or form between atoms, chemical energy is generated.
Examples include:
Using ice and salt to make ice cream.
Digestion of foods.
A Energy

5. Electrical Energy Movement of electrons
Transported through wires to where needed.
Easily changed to heat or mechanical energy.
Examples include:
Electrical home appliances – stove, refrigerator, dishwasher
A Energy

6. Radiant Energy
Energy transmitted in the form of waves through space or some medium.
Examples:
Microwave oven
Sun
Charcoal grills
Gas flames
A Energy

7. Nuclear Energy
Splitting or combining atoms of certain elements which give off radiation.
Examples:
X-rays in medicine
Nuclear power
Irradiation – food preservation
A Energy

8. What Is Heat? Definition—
An energy transfer from one body to another caused by a temperature difference between the two bodies.
A Energy

9. Three Ways Heat is Transferred
Conduction
Convection
Radiation
A Energy

10. Conduction Heat (or energy) is transferred by molecular collisions.
Example:
Cooking foods in an oven.
A Energy

11. Convection
Heat (energy) is transferred through molecular collisions and and currents.
Heat (energy) is more rapid than conduction.
Example:
Food cooked in boiling water.
A Energy

12. Radiation Heat (energy) is transferred by light waves through space.
Examples:
Sunlight
Microwave
A Energy