1. It’s takes a major boom to “wow” the kids these days…
Energy of Change
It’s takes a major boom to “wow” the kids these days…

2. Question:
What does it mean when we all say “Johnny has a lot of energy?”
We usually mean that Johnny is “active” and moving around a lot (as annoying as that can be).
But, (if he can just stay focused) imagine if he could use his energy for good, he could get a lot of things done.
As surprising as it may sound, energy and “work” are closely related! We’ll get back to that later…

3. What is Energy?
Energy:
The ability to do work (move large and/or small objects)
Think about things that have energy “in them”…
All those things can make something DO something!
It’s what causes change in everything!

4. Main Principal #1: All Energy in our solar system comes from the Sun!
The heat, pressure and gravity of the sun causes all energy.
The Suns energy causes change to everything in the solar system!

5. Heat Energy from our planet comes from the radio active core!
Main Principal #2:
Heat Energy from our planet comes from the radio active core!
Radio Active Core
There is so much heat and pressure
in the core that the Iron atoms are
constantly breaking apart!
This creates LOTS of heat = Energy!!!
This energy causes major changes on the surface of the planet!!!

6. Main Principal #3: There are two types of energy: Potential
Potential: “stored” energy (able or about to do something but isn’t just yet)
There are two basic examples
of Potential Energy:
The ball could fall,
but it hasn’t yet!
Gravitational
Elastic
The boulder can fall but it hasn’t yet
The “bow” can shoot the arrow
but isn’t right now.
Elastic Energy is caused by changing the shape of an object
(“stretching”, “bending”, “pulling”, “squishing”)
Gravitational Energy is caused by the force of gravity
Pulling down on an object while the object is being held up!

7. Main Principal #3: There are two types of energy: Kinetic
Kinetic: Energy of movement
This container is
full of a red liquid
But there is a hole!
Gravity pulls the
liquid down through
the hole!
The motion of the liquid is
an example of a substance
with Kinetic Energy
Ball falling down = Movement
Movement = Kinetic Energy

8. Potential vs. Kinetic: The Roller Coaster has potential energy at the
top of the hill
The rocket has potential energy
when the fuel hasn’t been lit
The rocket has Kinetic
energy when it’s fuel is
lit and it flies through the air
Wow!
There’s a lot of potential energy in this sucker!
But it has Kinetic energy
when it rolls down the hill!

9. Main Principal #4: There are SIX forms of energy
= Heat Energy: (Thermal) Measurement of total movement of Particles (kinetic energy)
Heat Energy is the form of energy that
is related to and caused by “heat”
Measurement of total movement
of molecules (Kinetic Energy)
Heat energy is measured
by “Temperature”
So a higher temperature simply
means that the atoms
are moving faster!
Liquid A
Liquid B
A higher temp. means more Kinetic
energy for the molecules!
Think: Which of the two liquid samples
has a higher temperature? WHY?

10. Mechanical Energy:
= Energy which deals with the motion of physical objects both large and small.
Like a ball bouncing…
Ball
Oh! And don’t forget music!
A person running…
A rocket launching…
Important: All motion will create heat! Rub your hands together,
what do you feel? Run a mile, what happens to your core
temp? Drive a car then feel the hood, what does it feel like?

11. Mechanical Energy
The little squares represent individual
Molecules of a “medium”. Notice they just
Move back and forth as he energy passes through!
Sound = Vibrations of molecules due to compressional disturbances
A “medium” is the solid, liquid or as that the energy is travelling through!
The wave lines represent the movement of energy!
Not the movement of the molecules themselves!

12. Electric Energy: = Movement of electric charges in FLOW
These charges can be made
to move through a wire
Electric energy “flows” through
wires to our houses where
we plug stuff in!
Electricity is electric energy
Lightning is Electric energy

13. Electromagnetic Energy:
Energy from the motion of a moving charged particle in the atoms disturbs the electromagnetic fields which effects other charged particles in other atoms.
Electromagnetic “Fields” being disturbed by the moving particle move in a wave like motion!
+/-
We will spend more time with this form of energy in our next unit!
Work = Force x Distance

14. held together by chemical
Chemical Energy:
= Energy holding atoms to other atoms (“bonds”)
Batteries use atomic
bonds for energy
Food=People Fuel!
2 Oxygen atoms being
held together by chemical
energy!
Fire is a result of
chemical energy
Plants make sugar
from sunlight
Gasoline=Car Fuel!

15. If we split an atoms nucleus, we release TONS of energy!!!
Nuclear energy:
Energy holding the nucleus (center) of an atom together.
If we split an atoms nucleus, we release TONS of energy!!!
Nuclear energy holds
P+ and N0 of the
nucleus together

16. Nuclear Energy We normally think of Nuclear
Energy like a nuclear bomb!
The most classic example of
Nuclear Energy is the Sun!
The idea of this energy being let
loose can be scary
Inside the sun, Atoms of Hydrogen
are being broken apart and remade into
new elements (like: Helium and Carbon)
In fact, all the energy for every
solar system starts out as
Nuclear Energy in a star!
But humans have figured out that
we can control this energy enough
to use it for electricity!