Transcript ENERGY

 THE
ABILITY TO DO WORK OR TO
CHANGE MATTER
 MOVEMENT
 SOUND
 HEAT
 LIGHT
IS
A
MOTION ENERGY
MOVING CAR, A BULLET,
A RIVER FLOWING
IS
ENERGY STORED IN MATTER
GRAVITATIONAL
POTENTIAL
ENERGY
ELASTIC POTENTIAL ENERGY
CHEMICAL POTENTIAL ENERGY
ELECTRICAL POTENTIAL
ENERGY
 AN
APPLE AS IT FALLS OFF OF A
TREE.
A
STRETCHED RUBBER BAND
 A BOW
A
BATTERY
 THE
MOVEMENT OF THE
MOLECULES THAT MAKE UP AN
OBJECT.
BY DOING WORK
OR
HEAT TRANSFER
WORK
= FORCE X DISTANCE
CONDUCTION
CONVECTION
RADIATION
 THE
TRANSFER OF ENERGY FROM
ONE MOLECULE TO ANOTHER.
 THE TRANSFER HAPPENS WHEN
THE MOLECULES HIT AGAINST
EACH OTHER.
 TAKES PLACE IN SOLID, LIQUIDS,
AND GASES BUT WORKS BEST IN
MATERIALS WITH SIMPLE
MOLECULES LIKE METAL.
 THE
MOVEMENT OF HEAT BY A
LIQUID OR A GAS.
 THE
LIQUID OR GAS CARRY THE
HEAT WITH IT AS IT MOVES.
 THE
MOVEMENT OF A MASS OF
HEATED WATER OR AIR IS CALLED A
CURRENT.
 THE
TRANSFER OF HEAT BY
ELECTROMAGNETIC WAVES.
 WHEN
WE FEEL THE HEAT FROM
THE SUN OR AROUND LIGHT BULBS,
IRONS, OR THE OVEN.
 HAS
FANS WHICH CAN BE TURNED BY
WATER, STEAM, OR WIND.
 IT
TURNS A SHAFT ON A GENERATOR.
 TRANSFORMS
KINETIC ENERGY
INTO ELECTRICAL ENERGY.
 WHEN
THE SHAFT OF THE
GENERATOR TURNS ELECTRICITY IS
CREATED.
 ENERGY
IS NEVER CREATED OR
DESTROYED.
 ENERGY
CHANGES FORM.
 COAL,
OIL, AND NATURAL GAS
 FORMED
MILLION OF YEARS AGO BY
HEAT AND PRESSURE.
 NONRENEWABLE
RESOURCE – IT IS
USED FASTER THAN CAN BE
REPLACED.
 BURNING
FOSSIL FUELS PRODUCES
POLLUTION.
 URANIUM
ATOMS BREAK APART
AND RELEASE GREAT AMOUNTS OF
ENERGY.
 ALMOST
NO AIR POLLUTION IS
CREATED.
 URANIUM
 THE
IS NONRENEWABLE.
WASTE PRODUCTS ARE
RADIOACTIVE AND VERY
DANGEROUS TO LIVING THINGS.
 WATER
WHICH IS TRAPPED BEHIND
DAMS IS USED.
 SUPPLIES
20% OF THE WORLDS
ELECTRICAL ENERGY.
 IT
CREATES ALMOST NO
POLLUTION.
 IT
DISRUPTS THE LIFE CYCLE OF
AQUATIC ANIMALS.
 SOLAR
 WIND
ENERGY
ENERGY
 ENERGY
FROM THE OCEANS
 GEOTHERMAL
 INEXHAUSTABLE
BE USED UP.
RESOURCE – CANNOT
 LESS
THAN .1 % OF THE ENERGY IN THE
U.S. COMES FROM SOLAR ENERGY.
 SOLAR
COLLECTOR – HEATS WATER
WHICH RUNS THROUGH THE HOUSE TO
HEAT HOUSE AND WATER.
 PHOTOVOLTAIC
– TRANSFORMS
SUNLIGHT INTO ELECTRICAL ENERGY.
 WELLS
ARE DRILLED TO REACH HOT
WATER AND STEAM.
 HEAT
PUMP IS USED TO COOL AND
HEAT HOUSES BY DRILLING
SEVERAL METERS UNDER
BUILDINGS.
A
PLANT CAN ONLY BE PLACED
WHERE THE HOT WATER IS CLOSE
TO THE SURFACE.
 THE
TIDE CHANGE IS USED TO TURN
TURBINES WHICH THEN TURN A
GENERATOR IN A POWERPLANT.
 THERE
MUST BE A GREAT CHANGE
IN TIDE LEVELS FOR THIS TO WORK.
 WINDMILLS
CONVERT THE WIND TO
ELECTRICAL ENERGY.
 THE
PROPELLER TURNS A GENERATOR.
 CREATE
A
ALMOST NO POLLUTION.
LARGE AREA IS NEEDED.
 THEY
CREATE NOISE AND CAN KILL
BIRDS.
QUESTIONS?