Transcript Electrical Energy

Energy
Objectives
1.
2.
3.
4.
Students will be able to identify various ways which
electrical energy is generated using renewable and
nonrenewable resources.
Students will identify several ways in which energy
may be stored.
Students will be able to compare how mechanical to
electrical energy and electrical to thermal energy is
transformed.
Students will be able to explain how thermal energy
can be transformed by conduction, convection and
radiation.
Forms of Energy
1.
2.
3.
4.
5.
6.
Thermal Energy the total energy of the particles
that make up an object
Chemical Energy the energy of a compound that
changes as its atoms are rearranged to form new
compounds
Electrical Energy the energy of moving electrons
Sound Energy caused by an objects vibrations
Light Energy produced by the vibrations of
electrically charged particles
Nuclear Energy the energy associated with changes
in the nucleus of an atom
Homework
Complete “Forms of Energy” Packet
on the back of the packet draw a
tree map with examples of the each
type of energy (at least 2 examples
each)
Due tomorrow 
Forms
Of Energy
Thermal
Energy
Examples
Chemical
Energy
Examples
Electrical
Energy
Examples
Sound
Energy
Examples
Light
Energy
Examples
Nuclear
Energy Examples
Nonrenewable/Renewable
Resources
1. Energy-the ability to do work (power)
2. Source-where something comes from
3. Work that occurs when a force causes
an object to move in the direction of
the source
4. Work and Energy are expressed in the
same units Joules (J)
What do you think?
Nonrenewable
Fossil fuels
Nuclear power
Renewable
Heat from within earth
Plant waste
water
Sun
Wind
Minerals
Homework
Complete “Energy, Renewable and
Nonrenewable Forms” packet
Due tomorrow 
Potential and Kinetic
Energy
Watch
Physical_Science_Motion
Video
18 minutes
**During video you should be able to define
potential and kinetic energy, write in
notebook**
Definitions
Kinetic Energy -energy of motion
Potential Energy- energy an object has
because of its position or shape
Mechanical Energy
=
Potential Energy
+
Kinetic Energy
Homework
Complete “Why Do Basketballs Bounce? Why Do
Eggs…Not?
Due Tomorrow
**Also bring basketballs, tennis balls and rubber balls
from home for an experiment
NO HOMEWORK
NO EXPERIMENT
Bounce Experiment
1. Copy the tree map in science notebook
for experiment
2. Make hypothesis and write down
Bounce
Experiment
Hypothesis
Type of Surfaces
Surface 1: Carpet
Surface 2: grass
Surface 3: Concrete
Measurements of
how high ball
Bounced
Bounce Experiment ?’s
1.
On which surface did the ball bounce the highest? Why?
2.
On which surface did the ball bounce the lowest? Why?
3.
What is the purpose of this experiment?
4.
What did you learn from this experiment about Potential and
Kinetic energy?
Energy Conversions
1. Energy Conversions= a change from one
form of energy into another
2. Example:
a. At what point does the rollercoaster
have the greatest kinetic energy?
b. At what point does the rollercoaster
have the greatest potential energy?
Examples of Conversions
Alarm Clock
Battery
Electrical
Chemical
Light bulb
Electrical
Blender
Electrical
Electrical
Kinetic and sound
Light and Thermal
Light and Sound
Conservation of Energy
1. Friction=a force that opposed motion
between two surfaces that are touching
2. Law of Conservation of Energy=energy
can be neither created nor destroyed