3.1+Natural+Souces+of+Thermal+Energy



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Students break into groups by number. Start numbering themselves off in order. What each group (about 4 members) must accomplish is: 1) a definition of their natural source of thermal energy, 2) Find an additional example of their energy and post to wiki, 3) Find if there is an environmental impact(positive or negative) from their form of energy and explain 4) Describe how this form might be relevant to our lives. Each member of the group must pick one role: researcher, writer, journalist and technology expert. Each group will present to the class when all groups are ready
 * 1) Biological Energy
 * 2) Chemical Energy
 * 3) Geothermal Energy
 * 4) Wind Energy
 * 5) Mechanical Forces
 * 6) Electrical Energy
 * 7) Solar Energy

**There are seven natural sources of thermal energy. They include:**

 * 1) **Biological Energy**
 * 2) **Chemical Energy**
 * 3) **Geothermal Energy**
 * 4) **Wind Energy**
 * 5) **Mechanical Forces**
 * 6) **Electrical Energy**
 * 7) **Solar Energy**

How Biology relevant to our lives:
Because you can learn a lot of things in society. However, no question can be answered by science alone. They involve the society in which we live and the economy that provides jobs, food and shelter. They may require us to consider laws and moral principals. In the end, we make the decisions on how to live life. We the citizens of democracy do.

Living organisms burn food (chemical energy) in their bodies to generate body heat (thermal energy). A composter is another source of thermal energy. Decomposers break down food and as these chemical changes occur, thermal energy is produced, which in turn helps speed up the process of decomposition.

**Chemical Energy:**
Chemical Energy can be transformed into Thermal Energy when wood, or coal is burned.

ex. rocket engine Chemical energy is the potential of a chemical substance to undergo a chemical change, i.e rocket engines, fireworks, TNT, other explosives, nuclear energy, etc.

Check out this website for more information: http://www.wisegeek.com/what-is-chemical-energy.htm

Geothermal Energy:
Volcanoes, hot springs and geysers are sources of geothermal energy - energy from the interior of the earth. The thermal energy from these events can produce hot water or steam, which can be then piped to a power plant at the surface. This can be used to run turbines which produce electrical energy. HRD (hot, dry rock) can be used as another technique to generate thermal energy. (Water is pumped into cracks in the earth's crust. It returns to the surface as steam, which can be used to generate electricity.



Wind Energy:
Wind energy is the energy of moving air, and is a result of solar energy and convection. As the sun heats up the air, the warm air rises and cools off. The cooler air falls, creating the convection currents called thermals. These convection currents, on a global basis, form the Earth's wind systems. The windmill is a turbine (a wheel with fan blades), which is connected to a generator. When the windmill spins the generator produces electricity.

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Mechanical Forces:
Mechanical forces that push or pull objects often release thermal energy, as do Frictional forces.



Captain George Vancouver was an English officer of the British Royal Navy, best known for his 1791-95 expedition, which explored and charted North America's northwestern Pacific Coast regions, including

Electrical Energy:
Electricity is produced in many ways. Hydro-electric dams use the force of gravity which pulls the water over the dam to turn turbines, which are attached to generators, which produce the electrical energy from the mechanical energy of the generators. Electricity can also be produced at thermo-electric (fuel-burning) generating stations that burn fossil fuels.



It is not available all the time). ** Why? **
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**Watch these videos. Think about and write down what you think is the main difference between passive solar heating and active solar heating?**
= Two ways to overcome these issues: = media type="youtube" key="lobSCweC2Nk" height="291" width="568"
 * Pair with your shoulder partner and share.**
 * 1) Passive solar heating

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2. Active Solar Heatingmedia type="youtube" key="boR-GU6ySDY" height="251" width="336"