How do we define Energy?
The ability to do work & cause a change.
Unit of measurement is the Joule ( J )
Examples of how we use energy:
cars move, bake a cake, play our favorite songs on
the iPOD, cell phone, grow food.
Turn to your partner
Name as many forms of energy as possible.
Fill in the brainstorm box on your Notesheet
You have 1 minute - GO
1. Light (radiant) Energy
Energy from the sun.
light energy travels by electromagnetic waves.
2. Chemical Energy
Energy stored in the bonds of atoms and molecules.
Examples: gas, coal, food
3. Nuclear Energy
Energy stored in the nucleus of an atom; LARGE
AMOUNTS OF ENERGY!!! (holds the nucleus
4. Electrical Energy
Energy due to the flow of negatively charged particles
Examples: static electricity, lightning, battery circuit.
5. Thermal (heat) Energy
The vibration and movement of the atoms and molecules;
as heat increases, atoms move faster.
The flow of thermal energy is called heat.
6. Mechanical Energy
Energy based on position and motion of an object.
Examples – compressed spring, stretched rubber band, ball
rolling down a hill.
Two types of Mechanical Energy
a. Potential – stored energy.
b. Kinetic – energy that an object has because of its motion.
* Mechanical Energy = Potential + Kinetic
Discovery Education : “Forms of Energy & Energy
Law of Conservation of Energy
Energy can neither be created nor destroyed but can be
changed (transformed) from one kind to another. The
total energy of an object never changes (it is conserved).
Examples of energy transformations:
Light bulb: electrical to light.
Photosynthesis: light to chemical.
Now it’s your turn
The energy stored in a banana is __________
A hair dryer converts __________ energy to
Now complete the left side and summary section
of your notes.
Now it’s your turn!
Energy Transformation Worksheet:
With your partner or in your group, come up with
5 other examples of energy transformations and
write them down, without the answers.
When you are done, switch your examples with
another group. Try to identify the energy
Which form of Energy?
Energy due to an object’s motion or
energy carried by electromagnetic
energy due to the movement of
molecules in substances.
energy from the movement of
energy stored/contained in bonds of
atoms and molecules.
energy stored in the nucleus of an atom
(holds the nucleus together).