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1. What is the independent variable” 2.What is the dependent variable? 3.What is the relationship...
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1. What is the independent variable”2.What is the dependent variable?3.What is the relationship between the # of pizza toppings and cost of the pizza?4.How much does a pizza with 3 toppings cost?5.**MATH** What is the slope of this line?
WARM UP
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ENERGY• Energy is the ability to do work.
•Work is a transfer of energy.
• Energy and work are expressed in units of joules (J).
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THE TWO MAIN FORMS OF ENERGY ARE:
Kinetic energy- the energy of motion.
Potential energy- stored energy that can be put into future use
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THE TWO MAIN FORMS OF ENERGY ARE:
Kinetic energy
Electromagnetic (light)
Thermal (heat) Sound Electrical
Potential energy
Chemical Nuclear
Mechanical (motion) mechanical (position)
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• Mechanical energy is the total energy of motion and position of an object. • mechanical energy potential energy kinetic energy
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More mass and/or higher velocity = more KE
More mass and/or higher above the ground (resting position) = more PE
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Each ball has the same mass. Which ball has the greatest potential energy?
a. Ball Ab. Ball Bc. Ball Cd. Ball D
22. USE THE DIAGRAM TO ANSWER THE QUESTION BELOW.
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• Thermal Energy is the energy of moving molecules
•All matter has thermal energy•Higher temperature = more KE
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http://www.youtube.com/watch?v=te7aFC8DTls
http://phet.colorado.edu/en/simulation/states-of-matter-basics
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• Electrical Energy - the energy of moving electrons.
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Sound Energy – moves through vibration of matter Travels in waves MUST have matter to travel through
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SEEING SOUND WAVES
http://www.youtube.com/watch?v=DPUlss0_Lkk
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• Electromagnetic Energy is produced by the vibrations of electrically charged particles.
•Travels in waves•Does NOT need matter to travel
•Examples: light, x-rays, microwaves
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COMPARE/CONTRAST: LIGHT AND SOUND
Light Sound
Travel in waves
Happen because particles vibrate
Needs matter to travel
Doesn’t need matter to travel
Kinetic energy
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•Chemical Energy –stored in bonds between atoms
• Examples: food, fuel, batteries
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• Nuclear Energy – stored in nucleus of an atom
• Fusion- nuclei join• Fission- nucleus is split
• Example: sun creates light/heat through fusion of hydrogen nuclei into helium
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http://phet.colorado.edu/en/simulation/nuclear-fission
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What type of energy?
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What type of energy?
ELECTROMAGNETIC
ENERGY
KINETIC ENERGY
WHY?
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What type of energy?
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What type of energy?
ELECTRICAL
ENERGY
KINETIC ENERGY
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HEAT FROM A TOASTER
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HEAT FROM A TOASTER
THERMAL
ENERGY
KINETIC ENERGY
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RING FROM A CELL PHONE
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RING FROM A CELL PHONE
SOUND
ENERGY
KINETIC ENERGY
((( ( ( (
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LUMP OF COAL
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LUMP OF COAL
POTENTIAL ENERGY
CHEMICAL
ENERGY
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MOVING BUS
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MOVING BUS
MOVINGMECHANICAL
ENERGY
KINETIC ENERGY
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LAW OF CONSERVATION OF ENERGY
Energy cannot be created or
destroyed only transferred from
one form to another
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1. BALL ROLLING DOWN A HILL
From: To:
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BALL ROLLING DOWN A HILL
From: To:
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2. LIGHT BULB
From: To:
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LIGHT BULB
From:Electrical Energy
To:Electromagnetic Energy
ELECTRICAL
ENERGY
KINETIC ENERGY
ELECTROMAGNETIC
ENERGY
KINETIC ENERGY
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3. ELECTRIC OVEN
From: To:
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ELECTRIC OVEN
From: Electricity To: Heat
ELECTRICAL
ENERGY
KINETIC ENERGY
THERMAL
ENERGY
KINETIC ENERGY
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4. BATTERY POWERED FLASHLIGHT
From: To:
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BATTERY POWERED FLASHLIGHT
From:Chemical Energy
To:Electromagnetic Energy
ELECTROMAGNETIC
ENERGY
KINETIC ENERGYPOTENTIAL ENERGY
CHEMICAL
ENERGY
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6. TREE
From: To:
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TREE
From:Sunlight
To:Wood
POTENTIAL ENERGY
CHEMICAL
ENERGY
ELECTROMAGNETIC
ENERGY
KINETIC ENERGY
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7. Ipod
From: To:
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Ipod
From:Batteries
To:Sound
POTENTIAL ENERGY
CHEMICAL
ENERGY
SOUND
ENERGY
KINETIC ENERGY
((( ( ( (
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8. SOLAR PANELS
From: To:
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SOLAR PANELS
From:Light
To:Electricity
ELECTROMAGNETIC
ENERGY
KINETIC ENERGY
ELECTRICAL
ENERGY
KINETIC ENERGY
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6. NUCLEAR POWER PLANT
From: To:
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NUCLEAR POWER PLANT
From:Nuclear Fission
To:Electricity
POTENTIAL ENERGY
NUCLEAR
ENERGY
ELECTRICAL
ENERGY
KINETIC ENERGY
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7. WIND FARM
From: To:
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WIND FARM
From:Movement
To:Electricity
ELECTRICAL
ENERGY
KINETIC ENERGY
MOVINGMECHANICAL
ENERGY
KINETIC ENERGY
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8. DAM (HYDROELECTRIC PLANT)
From: To:
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DAM (HYDROELECTRIC PLANT)
Input:MovingMechanicalEnergy
Output:Electricity
MOVINGMECHANICAL
ENERGY
KINETIC ENERGY
ELECTRICAL
ENERGY
KINETIC ENERGY
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9. TV
From: To:
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TV
From:electricity
To:Sound and light
POTENTIAL ENERGY
CHEMICAL
ENERGY
ELECTROMAGNETIC
ENERGY
KINETIC ENERGY
SOUND
ENERGY
KINETIC ENERGY
((( ( ( (
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11. FIRE
From: To:
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FIRE
From:Wood
To:Heat And Light
POTENTIAL ENERGY
CHEMICAL
ENERGY
ELECTROMAGNETIC
ENERGY
KINETIC ENERGY
THERMAL
ENERGY
KINETIC ENERGY
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12. THE SUN
From: To:
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THE SUN
From:Nuclear Fusion
To:Heat And Light
POTENTIAL ENERGY
NUCLEAR
ENERGY
ELECTROMAGNETIC
ENERGY
KINETIC ENERGY
THERMAL
ENERGY
KINETIC ENERGY
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13. CAR
From: To:
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SOUND
ENERGY
KINETIC ENERGY
((( ( ((
CAR
From:Gas
To:
MOVINGMECHANICAL
ENERGY
KINETIC ENERGY
POTENTIAL ENERGY
CHEMICAL
ENERGY
ELECTROMAGNETIC
ENERGY
KINETIC ENERGY
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EXIT SLIP1. Jose ate a turkey sandwich and an apple for lunch. Later that day, he ran 2 miles during soccer practice. Which of the following energy transformations occurred between lunchtime and the end of Joes’s run?a) Thermal energy was converted to kinetic energy.b) Kinetic energy was converted to chemical energy.c) Electrical energy was converted to thermal energy.d) Chemical energy was converted to mechanical energy.
2. What kind of energy transformation happens in a television?a) Light is transformed into electrical energyb) Electrical energy is transformed into chemical energy.c) Electrical energy is transformed into light energy.d) Chemical energy is transformed into light energy.
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EXIT SLIP3. What kind of energy transformation happens when a
person rides a bike down a hill?a) Light energy is transformed into chemical energy.b) Electrical energy is transformed into kinetic energy.c) Potential energy is transformed into kinetic energy.d) Kinetic energy is transformed into potential energy.
4. What kind of energy transformation happens when firewood it lit in a campfire?a) Light energy is transformed into chemical energy.b) Chemical energy is transformed into thermal energy.
c) Potential energy is transformed into kinetic energy.d) Kinetic energy is transformed into potential energy.
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EXIT SLIP5. What king of energy transformation occurs when you eat food and then do jumping jacks?a) Light is transformed into chemical energy.b) Electrical energy is transformed into chemical energy.c) Chemical energy is transformed into mechanical. d) Potential energy is transformed into Chemical energy.