Transcript Energy transformation

1)Energy transformation or conversion
is the change of energy from one form
to another. One of the most common
energy conversions involves the
changing of potential energy to kinetic
energy or vice versa, kinetic energy to
potential energy. However, other forms
of energy can also be converted.
(1) Energy transformation = energy
changing from one form to another
Conversion = transformation
Most common conversion =
Potential → Kinetic
Forms of energy:
1. Light
4. Chemical
2. Mechanical 5. Heat
3. Electrical
6. sound
2) For example, the light energy
from the sun can be converted
directly into electrical energy.
Additionally, plants use the light
energy from the sun and convert it
to stored chemical energy.
(
2) Light energy = sun, fire, electronic devices
Example transformation =
Sunlight → plant has photosynthesis → plant grows
(chemical energy)
(mechanical energy)
3) Chemical energy is when bonds
holding atoms together are broken.
Energy is released as the bonds
break. For example, when you burn
a fuel (like coal) the chemical energy
is release to create heat, light and
mechanical energy. Other examples
of chemical energy include a battery,
wood, energy stored in your body.
(3) Chemical energy = chemical bonds broken
• comes from: food, batteries, wood, plants,
fossil fuels,
Example transformation:
Coal → turbine turning → electricity created
(chemical) (mechanical) (electrical)
4) Mechanical energy is energy of
matter in motion. Some examples
of mechanical energy include
water falling, wind blowing, sound,
and the blood flowing through your
veins.
(4) Mechanical energy = moving energy
comes from: moving water, wind blowing,
sound, people moving
Example transformation:
Flip a switch → circuit closed → light on
(mechanical)
(electrical)
(light)
5) All matter is made up of atoms that
are constantly moving. The internal
motion of the atoms is called heat or
thermal energy. The faster the particles
move, the more heat energy is
produced. When you rub your hands
together (mechanical energy) heat
energy is produced. Thermal energy
changes the state of matter of
substances. Heat moves in waves.
5) Heat energy = moving atoms
comes from : sun, fire, moving objects,
electrical objects
Ex. Transformation:
Rub hands → heat
(mechanical) (heat)
6) Electrical energy is caused by moving
electric charges. Electrical energy causes
there to be sound energy from your CD
player, heat energy from your hair dryer,
and light energy from your lamps. Often a
whole series of energy conversions is
needed to do a particular job.
(6) Electrical energy: moving electrons
comes from: power plants, batteries, anything
electrical
Ex. Transformation:
heat light
Turbine
→ energy made → TV on sound
(mechanical) (electrical)
(electrical)
7) Sound energy is a vibration or
wave of air molecules caused by the
motion of an object. Sound waves
require some kind of material to travel
through. They can't move through a
vacuum. Sound waves move much
slower then light. Sound waves are
like heat conduction. No particles
actually travel.
Sound waves = energy moving in
waves and vibrating.
•Comes from: anything making sound
in a gas or liquid.
Ex. Transformation:
Battery in ipod
(chemical)
ipod on
(electrical)
music plays
(sound)