2. Energy Exists in Different Forms What is energy? Energy is the ability to cause change. All forms of energy cause change to occur.

3. Forms of Energy Mechanical Energy energy that moves objects stored in objects Sound Energy movement of energy through substances in longitudinal waves. force causes an object or substance to vibrate t transferred through the substance in a wave

4. Chemical Energy energy stored in chemical compositions atoms and molecules It is the energy that holds these particles together Biomass petroleum natural gas propane

5. Thermal Energy or heat the internal energy in substance the vibration and movement of the atoms and molecules within substances. Geothermal http://www1.eere.energy.gov/geothermal/gpp_animation.html

6. Electromagnetic Energy or radiant energy travels in transverse waves from our Sun and other stars Solar energy is an example of radiant energy.

7. Nuclear Energy stored in the nucleus of an atom the energy that holds the nucleus together energy released when the nuclei are combined or splitenergy released when the nuclei are combined or split Nuclear power plants split the nuclei of uranium atoms in a process called fission. The sun combines the nuclei of hydrogen atoms in a process called fusion.

8. Kinetic Energy Kinetic energy energy of motion. An object which has motion has kinetic energy whether it be vertical or horizontal motion where m = mass of object v = speed of object

9. Potential Energy stored energy that an object has due to its position or chemical composition stored energy that an object has due to its position or chemical composition Gravitational Potential Energy Gravitational Potential Energy Energy stored in an object as the result of its vertical position (i.e., height) Energy stored in an object as the result of its vertical position (i.e., height) PEgrav = mass * g * height PEgrav = m * g * h m = mass of the object, h = height of the object, g acceleration of gravity (9.78 m/s/s = 9.78 meters per second squared)

10. Elastic Potential Energy energy stored in elastic materials as the result of their stretching or compressing more stretch, the more stored energy Chemical Potential Energy Dependent on chemical Makeup: atoms and molecules Energy is released when molecules Are broken up or split. Atoms are rearranged