8th Grade Chapter 3 Lesson 4

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8th Grade Chapter 3 Lesson 4

  1. 1. 8 th Grade Chapter 3 Lesson 4 Pgs. 116 – 121 For Student Use Only
  2. 2. Energy For Movement <ul><li>Energy: the ability to do work </li></ul><ul><li>Work: when a force (a push or pull) moves an object </li></ul><ul><ul><li>An object posses energy if it it capable of doing work. </li></ul></ul><ul><ul><ul><li>Ex. Heat energy, sound energy, movement </li></ul></ul></ul>
  3. 3. Energy For Movement <ul><li>Energy takes many forms: </li></ul><ul><ul><li>Heat </li></ul></ul><ul><ul><li>Light </li></ul></ul><ul><ul><li>Electrical </li></ul></ul><ul><ul><li>Chemical </li></ul></ul><ul><ul><li>Mechanical </li></ul></ul>
  4. 4. Energy For Movement <ul><li>Mechanical Energy: </li></ul><ul><ul><li>Matter in motion or with the potential of motion. </li></ul></ul><ul><ul><ul><li>EX. Water flowing, drilling, mixer, running </li></ul></ul></ul>
  5. 5. Energy For Movement <ul><li>Energy Conversions: </li></ul><ul><ul><li>Energy is converted into different forms when mechanical energy is used. </li></ul></ul><ul><ul><ul><li>Drill gets hot </li></ul></ul></ul><ul><ul><li>Different energy can be converted into mechanical energy </li></ul></ul><ul><ul><ul><li>Gas energy to mechanical energy to make car go </li></ul></ul></ul>
  6. 6. Energy For Movement <ul><li>Types of Energy </li></ul><ul><ul><li>Kinetic Energy- “to move”- energy in motion- more kinetic energy faster motion </li></ul></ul><ul><ul><li>Potential Energy- “stored energy” the potential to do work </li></ul></ul><ul><li>When potential energy is released as kinetic energy, matter moves </li></ul>
  7. 7. Energy For Movement <ul><li>Energy Conversions </li></ul><ul><ul><li>Potential and Kinetic Energy are also found in: </li></ul></ul><ul><ul><ul><li>Chemical energy </li></ul></ul></ul><ul><ul><ul><li>Electric energy </li></ul></ul></ul><ul><ul><ul><li>Light energy </li></ul></ul></ul><ul><ul><ul><li>Sound energy </li></ul></ul></ul><ul><ul><li>When potential energy is released it becomes kinetic energy (some kind of kinetic energy) </li></ul></ul>
  8. 8. Energy For Movement <ul><li>Matter and Energy Conservation: </li></ul><ul><ul><li>Matter and Energy cannot be created or destroyed by ordinary means </li></ul></ul><ul><ul><li>They are conserved </li></ul></ul><ul><li>Law of Conservation of Matter: </li></ul><ul><ul><li>Matter can be neither created nor destroyed </li></ul></ul><ul><ul><li>It is changed into other substances </li></ul></ul>
  9. 9. Energy For Movement <ul><li>Law of Conservation of Energy: </li></ul><ul><ul><li>Energy cannot be created or destroyed but is only transformed from one substance to another </li></ul></ul>
  10. 10. Energy For Movement <ul><li>Roller Coaster: </li></ul><ul><ul><li>Potential and Kinetic Energy </li></ul></ul><ul><ul><ul><li>Explain how a roller coaster has: </li></ul></ul></ul><ul><ul><ul><ul><li>Potential Energy </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Kinetic energy </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Energy Conversion </li></ul></ul></ul></ul>
  11. 11. Energy For Movement <ul><li>Conservation of Mass and Energy: </li></ul><ul><ul><li>It is possible in extreme conditions to lose small amounts of mass. This mass is turned into a massive amount of energy. </li></ul></ul><ul><li>Law of Conservation of Mass and Energy: </li></ul><ul><ul><li>The total of the mass and energy of the universe always remains the same </li></ul></ul>
  12. 12. Energy For Movement <ul><li>Theory of Special Relativity: </li></ul><ul><ul><li>Theory enables people to see how much energy is equal to a certain amount of matter </li></ul></ul><ul><ul><li>E=mc 2 </li></ul></ul><ul><ul><ul><li>E= energy </li></ul></ul></ul><ul><ul><ul><li>m= mass </li></ul></ul></ul><ul><ul><ul><li>c= speed of light 2 </li></ul></ul></ul><ul><ul><ul><li>The energy produced from a small amount of matter can yield BIG energy! </li></ul></ul></ul>

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