Energy Heat Light Sound Kim Lachler updated 2015 NCES 6.P.1

What is Energy? the ability to work

So what is work? when a force causes an object to move in the direction of the force. Work = force X distance Energy is transferred from the first object to the second object, so that it can do work.

How is energy measured? Energy is measured in Joules (J) (1 J = amount of energy it takes to lift an object that weighs 0.445 pounds {1 Newton} 1 meter)

Three main types of energy Kinetic Energy energy in motion Kinetic energy = mv2 2 m = mass v = velocity

Three main types of energy Potential energy energy an object has because of its position Gravitational potential energy – the force of gravity working on an object Gravitational potential energy = weight x height Elastic potential energy – energy stored in a stretched rubber band

Three main types of energy Mechanical energy total energy of motion and position of an object Mechanical energy = potential energy + kinetic energy The mechanical energy remains the same. As potential energy increases the kinetic energy decrease. Or as the potential energy decreases the kinetic energy increases

6 other forms of energy Thermal energy kinetic energy due to random motion of particles that make up an object

6 other forms of energy Chemical energy potential energy based on the arrangement of atoms

6 other forms of energy Electrical energy potential energy based on moving electrons being ready to be used

6 other forms of energy Sound energy potential energy changing to kinetic energy through vibrations

6 other forms of energy Light energy Similar to sound energy - potential energy changing to kinetic energy through vibrations

6 other forms of energy Nuclear energy Nucleus of atoms contain huge amounts of potential energy

Nasa, electromagnetic spectrum http://imagine. gsfc. nasa Nasa, electromagnetic spectrum http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html, accessed 12/16/2010 Media College. COM, How Sound Waves Work, http://www.mediacollege.com/audio/01/sound-waves.html, accessed 12/16/2010 Cool Cosmos, What is Heat?. http://coolcosmos.ipac.caltech.edu/cosmic_classroom/light_lessons/thermal/heat.html, accessed 12/16/2010 KEEP, What is Energy?, http://www.uwsp.edu/cnr/wcee/keep/Mod1/Whatis/energymeasures.htm, accessed 12/17/2010 Discovery Education, Clip Art Gallery, http://school.discoveryeducation.com/clipart/category/anim.html, accessed 12/17/2010 Holt,Rinehart and Winsteon, North Carolina Holt Science & Technology, Holt,Rinehart and Winsteon, New York, 2005 Discovery Education, http://discoveryeducation.com, accessed 12/28/2010