1. Aim: How Can We Describe the Usefulness of Alternative Energy Sources Do Now: On Paper, List As Many Sources of Energy As You Can. H.W.: Aim: How Can We Describe the Usefulness of Alternative Energy Sources Do Now: On Paper, List As Many Sources of Energy As You Can. H.W.:

2. Some Energy Sources: Fossil Fuels (Coal, Oil, Natural Gas) Sun (Solar Energy) Running Water (Hydro Power) Wind Nuclear Hydrogen Cells Ethanol Gas Some Energy Sources: Fossil Fuels (Coal, Oil, Natural Gas) Sun (Solar Energy) Running Water (Hydro Power) Wind Nuclear Hydrogen Cells Ethanol Gas

3. How Do We Get Power?  Turbines are turned by an outside source of energy  The turning of the turbine can cause an electrical charge or allow for power  The electrical charge can then power electric motors and machines  Turbines are turned by an outside source of energy  The turning of the turbine can cause an electrical charge or allow for power  The electrical charge can then power electric motors and machines

4.  Pollution (Smog)  Non-Renewable  Green House Effect  Acid Rain  Pollution (Smog)  Non-Renewable  Green House Effect  Acid Rain Problems With Fossil Fuels

5. Wind Energy

6. 1.Wind Pushes on the angled blades, causing it to spin. 2.The spinning turns the turbine, producing power! 3.Wind is considered a renewable resource, it produces no pollution. Downside 1.Not very aesthetic 2.Not totally reliable 3.Disrupts migration of certain birds 1.Wind Pushes on the angled blades, causing it to spin. 2.The spinning turns the turbine, producing power! 3.Wind is considered a renewable resource, it produces no pollution. Downside 1.Not very aesthetic 2.Not totally reliable 3.Disrupts migration of certain birds

7. Hydroelectric

8. 1.Running water turns the turbines, producing energy 2.Practice of hydro power has been around for a long time, watermills 3.More reliable than wind or solar A.Most powerful hydro plants have an impact on the environment B.Can affect wildlife 1.Running water turns the turbines, producing energy 2.Practice of hydro power has been around for a long time, watermills 3.More reliable than wind or solar A.Most powerful hydro plants have an impact on the environment B.Can affect wildlife

9. Solar Energy

10. Light strikes a photovoltaic cell causing sunlight to transform into electrical energy 1.Sunlight is abundant, responsible for 99% of renewable energy on Earth 2.Electric power can be collected and stored in batteries for use when no sun is available A.A lot of energy is lost in the conversion B.Photovoltaic cells are delicate Light strikes a photovoltaic cell causing sunlight to transform into electrical energy 1.Sunlight is abundant, responsible for 99% of renewable energy on Earth 2.Electric power can be collected and stored in batteries for use when no sun is available A.A lot of energy is lost in the conversion B.Photovoltaic cells are delicate

11. Hydrogen Cell

12. 1.Chemical bonds in Hydrogen are broken, making energy available 2.The energy causes movement of electrons = Electrical energy 3.Byproducts are Hydrogen gas and Water A.New technology = expensive B.Hydrogen gas is not easily obtained 1.Chemical bonds in Hydrogen are broken, making energy available 2.The energy causes movement of electrons = Electrical energy 3.Byproducts are Hydrogen gas and Water A.New technology = expensive B.Hydrogen gas is not easily obtained

13. Writing Imagine what would happen to the world if people don’t start to develop and use alternative energy sources. Describe what the world will look like (the environment, any change to species, how people may feel or act) in at least One Full Paragraph Imagine what would happen to the world if people don’t start to develop and use alternative energy sources. Describe what the world will look like (the environment, any change to species, how people may feel or act) in at least One Full Paragraph