Transcript ENERGY
ENERGY What is it? Where is it used? Are there different types of energy? What is energy? Energy is the ability to do work Are there different types of energy? Yes, they are: kinetic, potential, thermal, gravitational, sound, light, elastic, electromagnetic, chemical, nuclear, mass energies Where is it used? Energy is used everywhere Thermal Energy • What is it? The kind of energy that is related to and/or caused by heat. Thermal energy is the difference between the internal energy of an object and the amount that it would have at absolute zero. Where does thermal energy originate from? • The main source of all thermal energy is the sun • Thermal energy can also be created when: – You create a greater amount of friction – Apply heat to a substance Real Life Examples Thermal Energy is used when cooking on the grill or over a fire! Example: Marshmallows Steak Fish More Real Life Happenings Have you ever got sunburn so bad, it hurt to move? This is another example of thermal energy. When the particles on your skin speed up and become heated, this produces the pain you feel. …And More Metal Refineries use thermal energy to heat the metal until it melts. They can then reform it into a more usable shape. ….. When you boil a pot of water, you are contributing energy to the bottom of the pot. The heat makes the particles move faster which creates thermal energy. More Real Life Instances Candles? Yes. They give off heat throughout the air. The molecules in the air begin to move faster and begin to warm. And one final example Pencil Sharpener – When two objects rub together it creates friction. If a pencil sharpener spins the pencil at an extreme rate, the warmer it will be. This is why, when you touch the pencil tip, you feel a slight amount of warmth. Conversion 1 Electrical Energy to Thermal Energy When an object is plugged in, it creates an electrical charge. The electrical charge allows the object to move. As the object moves at any rate, slow or fast, it becomes thermal energy. Conversion 2 Mechanical Energy to Thermal Energy When an objects motion changes direction, some of the energy of the motion of the object is converted into thermal energy. This is because friction creates heat. A basketball can be an example. When the ball is bounced, it heats up due to thermal energy which is coming from the mechanical energy of the balls movement. Thermal Energy Used Everyday Interesting Facts • When thermal energy is applied to a substance, the average velocity of the particles or molecules which make up the substance increase and become warmer • Thermal energy depends on the mass, temperature, and phase of an object Works Cited • We used the following cites for some of our information - www.wikipedia.com - www.discover.edventures.com - www.coolcosmos.ipac.caltech.edu