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Energy
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Energy is The ability to do work
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Law of Conservation of Energy
Energy cannot be created nor destroyed. It can only be transferred ,or converted, from one form to another!
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This boy converts the chemical energy of the food he has eaten into potential energy by climbing the stairs then into kinetic energy as he jumps down
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Energy comes in different forms
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1. Kinetic Energy. Any moving object has kinetic energy
1. Kinetic Energy. Any moving object has kinetic energy. The faster it goes the more kinetic energy it has. .
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This kinetic energy is converted to energy to bend metal and sound CRASH here.
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Kinetic energy is also called Mechanical Energy
Anything that moves has it
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A runner converts food energy to kinetic energy
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An animal famous for its kinetic energy
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Moving water particles have kinetic energy as well as heat energy.
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Total heat energy of an object.
2. Thermal Energy Total heat energy of an object. Objects contain different amounts of thermal energy
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A small amount of thermal energy
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A HUGE amount of thermal energy
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This molten steel is over 1200degrees C
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The heat energy of this liquid can burn this child as it is transferred to his skin.
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This is energy that is stored in chemical bonds.
3. Chemical Energy This is energy that is stored in chemical bonds.
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Food contains chemical energy which is broken down and converted to kinetic energy as we move.
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Batteries convert chemical energy to electric energy to light energy in a torch
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Batteries
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Batteries convert chemical energy to sound energy in mobile phones
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Fireworks convert chemical energy to heat light and sound
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4. Potential Energy. The energy of any object that is raised
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The bigger and higher the object the greater the potential energy.
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Moving electrical charges produce electrical energy.
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Electric energy can be converted to light and heat energy
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Or electric to sound energy
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Moving electric charge is converted to heat ,light and sound here
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Electric energy can be converted to heat like in this heater.
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6. Electromagnetic Energy
Energy that travels in waves even through the vacuum of space
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UV is electromagnetic energy that tans the skin.
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Microwaves are electromagnetic waves used in communication
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7.Sound Energy: Anything that makes a noise even…..a
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OR the sonic boom of this jet
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Or music
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Energy stored in the nucleus of an atom from fission or fusion
8.Nuclear Energy Energy stored in the nucleus of an atom from fission or fusion
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The nuclei of 1 kg of H atoms being split releases this kind of energy
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Atomic energy is controlled to produce power
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Atomic fusion occurs in the sun.
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Now do this quiz…..
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Write the numbers 1-10 in your book
Write down the energy conversions in each slide the first one is an example.
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Example Potential converted to kinetic energy
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1Nuclear energy to……… Nuclear to *
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2 Thermal energy to………
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3 Electromagnetic energy to……
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4 Electromagnetic energy to……
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5 Chemical energy to……..
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6 Electric energy to…….
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7 Electric energy to…..
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8 Nuclear energy to……..
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9 Chemical energy to…..
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10 Chemical energy to…..
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