Transcript ENERGY - Regional School District 17

ENERGY
Energy Forms, Conversion, Conservation and
Resources
Energy and Matter
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MATTER
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Takes up space, has volume
Smallest unit = ATOM, building blocks of all matter
ENERGY
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The ability to do work or cause change
Many forms
One form can be converted to another
Energy forms in our bodies: chemical, thermal, electrical and mechanical energy
States of Matter
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Atoms are in constant motion
The rate at which the atoms in a substance move determines its
state
Solids
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Fixed volume and shape
Vibrate in place
Liquids
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Atoms are fluid
Fixed volume only
Takes the shape of container
Gases
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Atoms are fluid & FAR APART (no attraction to each other)
Fill the volume and shape of the container
Move RAPIDLY
PLASMA
a gas composed of electrically charged particles
BOSE-EINSTEIN CONDENSATE
 atoms crowded close together in ultra-low temperatures that behave as if they were one
fluid-like superatom
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To cause a substance to change state, THERMAL ENERGY must be added or removed
ENERGY: the ability to do work.
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Energy is known by the changes it causes.
WORK: the transfer of energy.
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Measured in Joules
ENERGY: the ability to do work.
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Energy can be classified into 2 main types:
 KINETIC and POTENTIAL
ENERGY: the ability to do work.
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Kinetic Energy = the energy of motion.
KE = 1/2mv2
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Depends on an objects MASS and SPEED.
ENERGY: the ability to do work.
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Potential Energy = stored energy due to position or shape.
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Depends on an objects MASS and POSITION.
ENERGY: the ability to do work.
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Gravitational Potential Energy = stored energy due to position.
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PE = mgh
Depends on an objects MASS, HEIGHT AND ACCELERATION DUE TO
GRAVITY.
ENERGY: the ability to do work.
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Elastic Potential Energy = stored energy due to shape.
PE = 1/2k(compression or stretch)
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Depends on an objects “BOUNCINESS” AND HOW MUCH IT IS COMPRESSED OR
STRETCHED.
FORMS OF ENERGY
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Mechanical, Thermal, Chemical, Electrical, Electromagnetic,
Nuclear.
FORMS OF ENERGY
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Is all energy staying in the same form in each of these pictures….
ENERGY CONVERSIONS
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Name some of the energy conversions that are occurring.
ENERGY CONVERSIONS
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Is any energy LOST in these conversions…
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Law of Conservation of Energy
Energy CANNOT be created or destroyed.
ENERGY AT THE BEGINNING = ENERGY AT THE END