Energy
 “the ability to do work”
  E  = mc2 
  potential vs. kinetic
Energy		
	Potential Energy
		Gravitational
		Chemical
		Elastic
		Electromagnetic

	Kinetic Energy
		Moving objects
		Heat
		Sound waves
		Other waves
	Energy
 		Mass as “energy”
			Where do living organisms obtain energy?
				Sunlight
				Absorbed by plants
 				High-energy compounds made through photosynthesis
			Trophic levels
     				Based on how close organism is to sun
				90% of energy is “lost” as heat with each step  further down the chain
	Energy
 		LAWS   OF   THERMODYNAMICS

 			FIRST LAW  -  Conservation of Energy
				In an isolated system the total amount of  energy,    	including heat, is conserved.

			The many different kinds of energy are interchangeable.

			Although the kind of energy in a given system can change, the total amount cannot.