INTRODUCTION TO ENERGY SCIENCE Wind for Schools Webinar: August 12 th, 2010

Ability to do work or cause change Produces Warmth Produces Light Produces Sound Produces Movement Produces Growth Powers Technology What is energy? Courtesy of NEED

POTENTIAL KINETIC Stored energy or energy of position Gravitational, Stored Mechanical, Nuclear, Chemical Energy of motion Motion, Electrical, Sound, Radiant, Thermal Classes of Energy Courtesy of NEED

Nuclear Energy – energy stored in the nucleus of an atom Holds the atom together Nuclear Energy – energy stored in the nucleus of an atom Holds the atom together Potential Energy

Chemical Energy – energy stored in the bonds between atoms Holds molecules together Potential Energy

Energy and Power  Energy is a quantity, like distance.  1 kilowatt-hour = 1000 Watts x 1 hour  1 kilowatt-hour = 3.6 x 10 6 Joules  Power is a rate, like speed, it is the rate that energy is converted from one form to another.  1 Watt = 1 Joule / Second

WHERE DO WE GET ENERGY FROM AND WHAT DO WE USE IT FOR?

Energy Sources  Non Renewable  Fossil Fuels  Natural Gas  Shale Oil  Tar Sands  Nuclear Fusion Fuel  Renewable  Solar  Geothermal  Tidal

Solar  Direct Sunlight  Wind  Hydroelectric  Ocean Currents  Ocean Thermal Gradients  Biomass

World Primary Energy Consumption

US Energy Consumption

Types of Pollutants  CO 2 – Global Warming  CO – Health problem  PM – Respiratory and heart disease, haze  SOx – Acid Rain, respiratory illness, haze  NOx – Ozone formation, acid rain, smog, nutrient loading, global warming  Mercury – Neurotoxin  Lead – Neurotoxin  Arsenic - Poison  VOCs – Numerous health problems  Ozone – Health problems, damage to flora & fauna  Hundreds of other toxic chemicals