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Rebecca's power point

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Transcript

  • 1. Things and their energy By: Rebecca Robinson
  • 2. Energy Lets get something straight. All things have a certain type of energy when moving. That’s a fact. There are two types: Kinetic and Potential. Potential Energy - The possible amount of force an object has. The higher the object, the more potential energy it has. Kinetic Energy - The amount of force an object in motion has. The faster the object, the more kinetic energy it has.
  • 3. Airplane Problem (Question) What do you think? When an airplane lands, what dose an airplane’s kinetic and potential energy do? Does it decrease, or increase? Or dose one increase and the other decrease? Well?
  • 4. Airplane Problem (Ansewer) The kinetic energy decreases. How, you ask? Well the rule for kinetic energy is: The faster the object gose, the more kinetic energy it has. So when the plane lands, it slows down, so the kinetic energy decreses. The potential energy decreses, too. The rule for potential is: The higer the object, the more potential energy it has. So when the plane lands, it gets lower and the potential energy decreses too.
  • 5. Chemical Properties Each object has chemical properties. Chemical Properties - Chemical reactions, combustion, rusting, or burning/setting on fire. Cannot be reversed.
  • 6. Pyhical properties Every object has many pyhical properties. Pyhical properties - our five sences: smell, touch, taste, sound, etc. Can be reversed.
  • 7. Heat Transfer Some things give off heat, but how? How do we feel heat without touching the cause? Or when we feel heat WHEN the touch it. Also when we are outside and the wind heats us up? Theese are all ways off heat transfer.
  • 8. Radiation Radiation- heat waves passing by. Examples: The sun’s rays warming your face. A light bulb’s electricty passing through out its wires. A kid sitting next to you sweaty body.
  • 9. Conduction Conduction- heat given by an object from touching it. Examples: A pot on a fire. A child touching a stove. A pan from the oven.
  • 10. Convection Convection- the heat of moving wind or water. Examples: Water in a pot boiling. The land breeze on a beach blowing in your face. A cold front following a warm front.
  • 11. The End! Thanks For watching <I will not bother you any more>