* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download What Are Some Forms of Energy?
William Flynn Martin wikipedia , lookup
Open energy system models wikipedia , lookup
Energy storage wikipedia , lookup
Energy subsidies wikipedia , lookup
100% renewable energy wikipedia , lookup
Potential energy wikipedia , lookup
Low-Income Home Energy Assistance Program wikipedia , lookup
Public schemes for energy efficient refurbishment wikipedia , lookup
Kinetic energy wikipedia , lookup
Zero-energy building wikipedia , lookup
Energy Charter Treaty wikipedia , lookup
World energy consumption wikipedia , lookup
Regenerative brake wikipedia , lookup
Low-carbon economy wikipedia , lookup
Gibbs free energy wikipedia , lookup
Energy policy of Australia wikipedia , lookup
Alternative energy wikipedia , lookup
International Energy Agency wikipedia , lookup
Energy returned on energy invested wikipedia , lookup
Internal energy wikipedia , lookup
Energy policy of the United Kingdom wikipedia , lookup
Energy efficiency in transport wikipedia , lookup
Distributed generation wikipedia , lookup
Energy harvesting wikipedia , lookup
Life-cycle greenhouse-gas emissions of energy sources wikipedia , lookup
Energy policy of Finland wikipedia , lookup
Negawatt power wikipedia , lookup
Conservation of energy wikipedia , lookup
Energy policy of the European Union wikipedia , lookup
Energy in the United Kingdom wikipedia , lookup
United States energy law wikipedia , lookup
Energy efficiency in British housing wikipedia , lookup
Energy applications of nanotechnology wikipedia , lookup
Energy Independence and Security Act of 2007 wikipedia , lookup
What Are Some Forms of Energy? mechanical energy [muh•KAN•ih•kuhl EN•er•jee] the total potential energy and kinetic energy of an object Mechanical and math begin with the same sound. Here is the math of mechanical energy: If you add potential energy and kinetic energy, you get mechanical energy. potential energy + kinetic energy = mechanical energy chemical energy [KEM•ih•kuhl EN•er•jee] energy that can be released by a chemical change Burning a wood log is a chemical change because the wood changes to smoke and ash, new matter. If you stand near a fire, you know that burning also gives off heat. The heat is chemical energy because it is given off during a chemical change. electrical energy [uh•LEK•trik•uhl EN•er•jee] energy that comes from electrical current Electrical and electricity are in the same word family. Electrical energy is electricity. Science Concepts Read the Ideas more than once. Do your best to remember them. 1. Energy is the ability to make matter change. 2. Something in motion, such as a rabbit hopping up and down, has kinetic energy. 3. Potential energy is energy that something has because of where it is or what condition it is in. 4. A ball on a shelf has potential energy because of where it is. 5. A spring wound tight has potential energy because of its condition—being wound tight. 6. Mechanical energy is the total of an object’s potential and kinetic energy. 7. Sound energy is caused by vibration, a back-and-forth motion. 8. The sun and electricity are both sources of light energy. 9. Chemical energy, which is given off by a chemical change, is the energy we get from food. 10. Electrical energy powers our computers, televisions, and machines. What Are Some Forms of Energy? Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Ellie plugs a radio into an electrical outlet and turns it on. What change in energy takes place when she does this? A. B. C. D. Light energy changes into sound energy. Electrical energy changes into sound energy. Sound energy changes into electrical energy. Chemical energy changes into sound energy. ____ 2. The pictures below show different forms of energy. Which picture shows an object with mostly potential energy? A. C. B. D. ____ 3. Fossil fuels are a major source of energy. Which material is not a fossil fuel? A. B. C. D. Coal natural gas Oil Wood ____ 4. Fossil fuels are the most common source of energy. What else is true of fossil fuels? A. B. C. D. They are renewable. They form quickly underground. They can be made in a laboratory. They are burned to release energy. ____ 5. Trinity buys a battery for her flashlight. Which type of energy does the battery have? A. B. C. D. light energy kinetic energy potential energy electrical energy ____ 6. A rolling ball has kinetic energy. What does it mean for an object to have kinetic energy? A. B. C. D. The object is in motion. The object has stored energy. The object has used all of its energy. The object is passing on its energy. ____ 7. Which form of energy results from vibrations that travel through air? A. B. C. D. sound energy potential energy electrical energy chemical energy ____ 8. Objects can have potential energy because of their position. Which object has potential energy? A. B. C. D. book sitting on a table hands turning on a clock spinning wheels on a bike flag flapping in the wind ____ 9. Shawn and his family sit around a campfire. What provides energy to keep the fire going? A. B. C. D. Flames Heat matchstick Wood ____10. Objects may have potential energy or kinetic energy. How do potential energy and kinetic energy compare to each other? A. B. C. D. Both describe objects at rest. Both describe objects in motion. Both are forms of mechanical energy. An increase in one leads to an increase in the other. ____11. Objects can have potential energy because of their position. Which object has potential energy? A. B. C. D. a parked car idling a rocket on its way to space a spinning top on the floor a mango hanging from a branch What Are Some Forms of Energy? mechanical energy [muh•KAN•ih•kuhl EN•er•jee] the total potential energy and kinetic energy of an object Mechanical and math begin with the same sound. Here is the math of mechanical energy: If you add potential energy and kinetic energy, you get mechanical energy. potential energy + kinetic energy = mechanical energy chemical energy [KEM•ih•kuhl EN•er•jee] energy that can be released by a chemical change Burning a wood log is a chemical change because the wood changes to smoke and ash, new matter. If you stand near a fire, you know that burning also gives off heat. The heat is chemical energy because it is given off during a chemical change. electrical energy [uh•LEK•trik•uhl EN•er•jee] energy that comes from electrical current Electrical and electricity are in the same word family. Electrical energy is electricity. Science Concepts Read the Ideas more than once. Do your best to remember them. 1. Energy is the ability to make matter change. 2. Something in motion, such as a rabbit hopping up and down, has kinetic energy. 3. Potential energy is energy that something has because of where it is or what condition it is in. 4. A ball on a shelf has potential energy because of where it is. 5. A spring wound tight has potential energy because of its condition—being wound tight. 6. Mechanical energy is the total of an object’s potential and kinetic energy. 7. Sound energy is caused by vibration, a back-and-forth motion. 8. The sun and electricity are both sources of light energy. 9. Chemical energy, which is given off by a chemical change, is the energy we get from food. 10. Electrical energy powers our computers, televisions, and machines. What Are Some Forms of Energy? Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Ellie plugs a radio into an electrical outlet and turns it on. What change in energy takes place when she does this? A. B. C. D. Light energy changes into sound energy. Electrical energy changes into sound energy. Sound energy changes into electrical energy. Chemical energy changes into sound energy. ____ 2. The pictures below show different forms of energy. Which picture shows an object with mostly potential energy? A. C. B. D. ____ 3. Fossil fuels are a major source of energy. Which material is not a fossil fuel? A. B. C. D. Coal natural gas Oil Wood ____ 4. Fossil fuels are the most common source of energy. What else is true of fossil fuels? A. B. C. D. They are renewable. They form quickly underground. They can be made in a laboratory. They are burned to release energy. ____ 5. Trinity buys a battery for her flashlight. Which type of energy does the battery have? A. B. light energy kinetic energy C. D. potential energy electrical energy ____ 6. A rolling ball has kinetic energy. What does it mean for an object to have kinetic energy? A. B. C. D. The object is in motion. The object has stored energy. The object has used all of its energy. The object is passing on its energy. ____ 7. Which form of energy results from vibrations that travel through air? A. B. C. D. sound energy potential energy electrical energy chemical energy ____ 8. Objects can have potential energy because of their position. Which object has potential energy? A. B. C. D. book sitting on a table hands turning on a clock spinning wheels on a bike flag flapping in the wind ____ 9. Shawn and his family sit around a campfire. What provides energy to keep the fire going? A. B. C. D. Flames Heat matchstick Wood ____10. Objects may have potential energy or kinetic energy. How do potential energy and kinetic energy compare to each other? A. B. C. D. Both describe objects at rest. Both describe objects in motion. Both are forms of mechanical energy. An increase in one leads to an increase in the other. ____11. Objects can have potential energy because of their position. Which object has potential energy? A. B. C. D. a parked car idling a rocket on its way to space a spinning top on the floor a mango hanging from a branch