Transcript Energy - My CCSD

Brainstorm Energy
ENERGY
7 Forms of Energy
1)
2)
3)
4)
5)
6)
7)
Heat
Chemical
Light
Electrical
Mechanical
Sound
Nuclear
Create 7 of these in your NotesOne for each type of Energy!
Definition:
Examples:
Picture or Symbol:
Interesting Info:
Energy
• The ability to do work
• Involves either motion or position
• There are many different types of
energy
• Law of Conservation of Energy states
that Energy cannot be created nor
destroyed only transformed from one
form to another!
In your notes…
Energy = the ability to do work
Renewable Resources = Can get
back
Nonrenewable Resources =
Cannot get back
Conservation = conserving/saving
our resources
Energy Resources
•
1.
2.
3.
4.
5.
6.
7.
Renewable and nonrenewable forms of
energy (Brain Pop Natural Resources)
Fossil Fuels (Nonrenewable) Brain Pop
Solar (Renewable)
Wind (Renewable)
Water (Renewable)
Nuclear (Renewable)
Geothermal (Renewable)
Biomass (Renewable)
Renewable Resources
• Natural resources that CAN be
replaced by natural processes in a fairly
short amount of time
• Examples: Wind, Sun, Biomass, Nuclear,
Water, Geothermal, etc.
Nonrenewable Resources
• Natural resources that either CANNOT
be replaced or which may take millions
of years to be replaced by natural
processes.
• Examples: Fossil Fuels - Oil, Coal, Gas,
and Some Minerals
Heat Energy
Definition: the energy of moving particles of
matter
Examples: Solar, Fire, Chemical, Body,
Electrical, Friction, Nuclear, Geothermal,etc
Pic/Symbol:
Interesting Info: There is more Heat Energy in
an Iceberg than there is in a boiling pot of
water!
Heat vs. Temperature
Heat= the number of molecules
Temperature= the motion of molecules
Which has more Heat?
Which has more Temp?
Boiling pot of water vs. Iceberg
Ice Sculpture vs. Lit Match
Chemical Energy
Definition: Energy stored in the chemical
compounds of food & fuel
Examples: Fossil Fuels (Oil, Gas, & Coal)
Wood, Stored in food, etc.
Pic/Symbol:
Info: One of our most abundant and
important sources of energy!
Light Energy
Definition: Energy from the
Electromagnetic Spectrum (EMS)
Examples: Sun, light bulb, lightning, etc.
Picture/Symbol:
Interesting Information: Light is both a
particle (photon) and a wave!
Electrical Energy
Definition: The energy of moving
electrons.
Examples: Power plant, batteries, static,
current, etc.
Picture/Symbol:
Interesting Information: Alternating
Current= when you plug something in!
Direct Current= Battery (1 direction – to +)
Mechanical Energy
Definition:The energy of an object that is due
to its position (potential) or motion (kinetic).
Examples: Roller coaster at top of hill PE &
Roller coaster going down hill KE
Picture/Symbol:
Interesting Information:Mechanical Energy
allows an object to do work!
Mechanical NRG = Potential NRG + Kinetic NRG
Sound Energy
Definition: Energy created by vibrating
objects.
Examples: sound from a speaker, radio,
TV, wind, thunder, or someone’s voice
Picture/Symbol:
Interesting Information: Sound travels
through a medium and the speed of
sound depends on the density of the
medium!
Nuclear Energy
• Definition: Uses atomic reactions to
produce electricity.
Examples:
• Fission (split) and fusion (fuse) of
radioactive nuclei
Picture/Symbol:
Interesting Information: E = mc2
• This mass can be changed into energy
under the proper conditions according
to Albert Einstein's famous equation:
where E = energy, m=mass, and c=speed
Potential Energy
•Potential energy is stored energy/energy of
position.
•Ex)
•The Potential Energy Equation
•PE = mass x gravity x height
•m = mass (in kg), g = gravity (9.8m/s2), and
height (in meters) = potential energy (in J =
joules).
•There is an inverse relationship between
potential and kinetic energy
•As PE increase KE decreases and as PE
decreases KE increases.
Kinetic Energy
•
•
•
•
•
•
Kinetic energy is the energy of motion.
Any object that is moving has kinetic energy.
Ex) Ball Moving, Wind, Sound
The Kinetic Energy Equation
KE= ½ mv2
m = mass (in kg), v = velocity (in m/s), and KE =
kinetic energy (in J = joules).
• There is a direct relationship between KE and
mass and between KE and v squared.
• Therefore as the mass goes up, KE goes up.
And as v goes up, KE goes up.