Introduction to Energy

What is Energy? [answers from previous students] The power to make machines go… A [power] source that makes technology work… A fuel [source] The power to make things move

What is Energy? Definition from Webster’s Online Dictionary A fundamental entity of nature that is transferred between parts of a system in the production of physical change within the system and usually regarded as the capacity for doing work Usable power

What Are the Different Energy Sources? [from previous students] Wind Water Nuclear Solar Fossil Fuels Electricity Heat Biofuel Chemical Geothermal Food Wood Muscle Power

What Are the Different Energy Sources? From Project NEED website http://www.need.org/needpdf/infobook_activities/PriInfo/SourcesP.pdf Biomass- bio = living renewable [less than 100 years to reproduce] Coal-fossil fuel, carbon nonrenewable [more than 100 years to reproduce] Geothermal- geo = earth; thermal = heat renewable [less than 100 years to reproduce] Hydropower- hydro = water renewable [less than 100 years to reproduce] Natural gas- fossil fuel nonrenewable [more than 100 years to reproduce] Petroleum-fossil fuel nonrenewable [more than 100 years to reproduce] Propane-fossil fuel nonrenewable [more than 100 years to reproduce] Solar- renewable [less than 100 years to reproduce] sol = sun Uranium-nonrenewable [more than 100 years to reproduce] Wind- renewable [less than 100 years to reproduce]

What Is A Fossil Fuel? Fossil Fuel [What is It?] Billions of dead things, layed up in rock layers, put down by water, all over the earth.

What Are the Forms of Energy? from Project NEED website http://www.need.org/needpdf/FormsofEnergy.pdf Nuclear Chemical Mechanical [motion] Electrical Sound Radiant [from the sun] Thermal [heat] Light