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Forms Of Energy By: Ivy Couch Class Period: 4th Date:10/14/15 Standards: S8P2. Students will be familiar with the forms and transformations of energy. • a. Explain energy transformation in terms of the Law of Conservation of Energy. • b. Explain the relationship between potential and kinetic energy. • c. Compare and contrast the different forms of energy (heat, light, electricity, mechanical motion, sound) and their characteristics. Mechanical Energy • • Mechanical energy is related to the position and motion of an object. Examples: 1) Pitcher throwing a baseball 2) Throwing a football 3) Hammering a nail when throwing a foot ball it has mechanical energy because you have to add both potential and kinetic energy to find the distance of how far the ball will go. Throwing a baseball you have to subtract both kinetic and potential energy and it can tell about have far the ball will go. When hammering a nail is mechanical energy because you have to be precise. It can change from mechanical to thermal energy because of the friction of the hammer hitting the nail which would also go to sound energy from when it hits the nail. Thermal Energy • The total of potential and kinetic energy of the particles in an object. • Examples: 1) ice cream melting 2) Lava going down a volcano 3) Boiling water Boiling water is thermal because the pot you are boiling the water in heats up for the water to boil. An ice cream cone could both thermal and chemical energy. It could be thermal once it begins to melt in your mouth then change to chemical once its in you feeding off energy to your body. Also could be kinetic energy when the ice cream in running down the cone while meting. Lava going down a volcano is thermal because the hot lava begins to loose its heat and harden. Electric Energy • Energy of electric charges. Can be either potential or kinetic depending on if they are in motion or being stored. • Examples: 1)Lightning 2)Getting shocked by doorknob 3)Power outlet Lightning has electric charges that make it form electric energy. This could also be thermal energy if it stuck something because it can cause heat. This is also be electromagnetic energy because it causes light. When getting shocked by a door knob it is electric charges releasing to your hand. A power outlet is an example of electric energy because it gives off electricity to things that are plugged into it. Chemical Energy • Bonds between the atoms and molecules hold a chemical compound. • Examples: 1) food 2) batteries 3) coal Food is an example of chemical energy because it gives energy to your body to do more things. This could also be thermal depending on the food, or when you are chewing from the friction. This could be potential energy because before you eat it is filled with energy. A battery is a chemical energy because it is chemical bonds getting ready to be released to force something else to gain power. Coal is a chemical energy because it is chemical bonds getting ready to be heated to give off energy (like a train). Nuclear Energy • Stored in the nucleus of an atom. His energy is released during a nuclear reaction. • Examples: 1) Power plants 2) Sun 3) Grenade A grenade is nuclear because it can give off an explosion or a very reactive affect. Power plants are nuclear because of the different reactive things they give off into the air. The sun is an example of nuclear energy because the different charges it gives off to us on an everyday base. It could also be light and thermal energy. It could be light because it lights up the world daily. It is thermal energy because it gives off different amounts of heat depending on where you are. But also it could be electromagnetic energy because of the light coming from it. Electromagnetic Energy • Travels in waves, they have some electrical properties and some magnetic properties. • Examples: 1) X-rays 2) Radio X-rays travel in light waves to figure the different results of what it shows which is electromagnetic. Radio travel through waves such as sound waves. 3) Microwaves A microwaves travel in several different energies. It could go from electromagnetic from the light, then could cause thermal energy from the heat, but also sound energy because it comes through with a sound. Potential Energy • The energy that is stored in an object. • Examples 1) bike stopped on a hill 2) holding a ball before releasing it 3)pulling a bow string back Before pitching the ball you have a full amount of potential because you are about to let go with all of your power to the ball. When the bike is at the top of the hill it has the highest point of potential energy because it is soon going to be transferred to kinetic. A bow is an example because when you pull it back it is filled with potential energy to be released into kinetic. This could also be thermal energy once it hits what you are aiming for when it rubs together to make heat. But also could be mechanical because you should have a precise motion. Kinetic Energy • Kinetic energy is the energy being released from an object Examples 1) Throwing a ball 2) riding a bike down a mountain 3) Using a battery When a pitcher throws a ball it is giving transferring from potential to kinetic while in mothing. Riding a bike down a hill is an example of kinetic because it is giving off potential and changing to kinetic. This is also thermal energy depending on what the ground is like you are riding on. But also sound if you can hear you hit different rocks or the tires/metals making noises. Using your phone means you are using your battery which means you are giving off potential to kinetic from the highest and lowest point to kinetic energy. You are using up kinetic that will soon be potential when it dies. Sound Energy • Sound energy is the different noises you hear. • Examples: 1) vacuum 2) blow dryer 3) coke/ soft drinks Coke is an example of sound because when you open it, it has a fizz/ bubble sound. A vacuum starts at electrical energy from when you plug it in then goes to sound and then goes to thermal from he friction from moving it around on the floor. A blow dryer is an example of sound because when you use it, it has a sound. Law of Conservation of Energy Energy may not be lost/destroyed nor be gained/made Energy can never be taken away. It can only be “transferred” from one type to another. For example if you have potential standing in one place then you began to walk it will began to change into kinetic with motion. Resources 1.Google images 2.Graphic organizers 3.All the notes I have taken