Unit c heattemperaturenotes(sources of heat)

1. Sources of Heat

2. Renewable vs. Non-renewable
• Renewable: Natural
resources that can be
replaced.
• Non-renewable:
Resources that cannot
be replaced.

3. Fossil Fuels
• Fossil Fuels:
• Non-renewable
• Source of almost all of the world's
heating/electricity.
• Made from remains of plants and animals
that died millions of years ago.

4. Fossil Fuels
• Economic Cost: Cost to obtain fuel. Cost
increases as supplies decrease.
• Environmental Cost: Effect on environment.
Main effect is air pollution.
• Societal Cost: Effect on people. Air pollution
leads to health risks, increases medical costs...

5. Alternatives to Fossil Fuels
• Wind Energy:
• -Captured by windmills
• -Inexpensive and simple
• -Only works in windy regions

6. Alternatives to Fossil Fuels
• Nuclear Energy:
• -Uses uranium to make heat
• -Takes only a small amount of fuel
• -Non-renewable
• -Waste is very harmful (radioactive waste
takes 100's or 1000's of years to disappear)

7. Alternatives to Fossil Fuels
• Hydro-Electric:
• -Captured energy of falling water
• -Clean and renewable
• -Expensive to build

8. Alternatives to Fossil Fuels
• Cogeneration:
• -Waste heat energy is recycled to
produce steam.
• - Expensive