8th Grade Chapter 3 Lesson 4

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