Energy Transformations What do these two photos have in common? (Hint: Think energy) Energy Transformations

Energy Energy – the ability to do work Can cause change in temperature, speed, shape or direction of an object Potential Energy – stored energy that can be converted to other forms of energy Kinetic Energy – energy of movement

9 Different types of energy Mechanical Thermal Sound Electrical Radiant Chemical Nuclear Gravitation Elastic

Let’s Take a Moment In the morning your wake up and turn the light switch, this converts ________ energy to ________energy. After you eat breakfast, your body turns _________ energy into _________ energy while you walk to school.

Many Forms of Energy The sun (solar energy) is used by plants to produce sugar (glucose) A campfire produces thermal energy (heat) Some homes convert solar energy into electrical energy Wind energy gets converted to electricity Geothermal energy heats hot springs

Website Go to the website and complete the worksheet called “Skate Park Energy” Once done with the skate park, you will complete the definitions. Show Mr. James when you are done for the next activity!

Energy Conversions In order to do work, energy constantly changes from one form to another Energy in = input energy The system where the energy is changed is called a converter Energy out = output energy

Example of Energy Conversion  

Can you think of a time when thermal energy is wasted? During physical activity Running an engine Drill press (what happens if there is too much!?)

Conservation of Energy What types of energy are produced by a blow dryer? Conservation of Energy

Blow Dryer Electricity get converted to thermal Thermal energy provides the heat to dry your hair Kinetic energy in moving the air particles Some electricity is converted to sound energy Glowing element is light energy Fan is run by a motor, but motor has friction (unused heat to dry hair)

Remember, the Law of Conservation of Mass states… In a chemical reaction, mass cannot be created or destroyed, it simply changes forms Therefore, the Law of Conservation of Energy must be… Energy cannot be created or destroyed it simply changes from one form of energy to another

Energy Conversion Systems A car engine converts about 1/3 of the energy input to useful energy output Therefore, Energy in = energy out OR Energy in = Useful energy out + waste energy out

Review Page 83 # 1-2 Page 85 # 1-3 Page 91 #1-3