Recent Changes

ALSO...
http://www.teachersdomain.org/asset/phy03_int_spectrum/
and one more...
http://www.absorblearning.com/physics/demo/units/DJFPh063.html#Summary

Energy is never created or destroyed it only changes form. This is true even when motion stops.
For example...Potential energy in a swing can change to Kinetic energy and then to heat energy from friction against air molecules as the swing slows down and stops. The energy is not lost only changed to a different form or type.
WAVES...
http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html
ALSO...
http://www.teachersdomain.org/asset/phy03_int_spectrum/

Also...
http://serc.carleton.edu/NAGTWorkshops/energy/visuals.html
What is Energy?
Energy is the ability to move matter.
Energy comes in two forms...
Potential (stored) & Kinetic (moving)
For example...A stretched rubber band has potential energy and when it flies away it has kinetic energy.
What other examples did we describe and observe in class?
Energy also come in 6 basic types...Electrical, Mechanical, Heat, Light, Sound, and Chemical
There are many resources to give us energy such as fossil fuels, water, wind, solar and nuclear energy.
Some are renewable others are nonrenewable.
Energy is never created or destroyed it only changes form. This is true even when motion stops.
For example...Potential energy in a swing can change to Kinetic energy and then to heat energy from friction against air molecules as the swing slows down and stops. The energy is not lost only changed to a different form or type.

The turbines keep the magnets spinning near the copper coils.Electrons get pushed to our homes through transmission lines giving us a continuous flow of electricity.Fossil Fuels are non-renewable which means we will run out of them someday.They also cause pollution.
There are other energy resources that are renewable and less polluting such as...Wind Turbines, Wave Turbines, Solar Cells and Solar Mirrors, Nuclear Power, and Hydro-Power Plants
Click here to learn more about each resource...
http://energyquest.ca.gov/story/chapter01.html
Also...
http://serc.carleton.edu/NAGTWorkshops/energy/visuals.html

Also check our...
cell_assignment.ppt
What is current electricity and how is it created?Current electricity is a constant flow of electrons.
Copper atoms can pass their electrons to each other in a wire.Electricity can be made with chemicals in batteries or in power plants using magnets that spin near copper coils.As long as the magnets keep spinning, the electrons will jump from copper atom to copper atom in a wire.Over half of our electricity is made by burning fossil fuels.Fossil fuels include:Coal - made from ancient plants that decayed in swamps.Oil - made from ancient ocean plants and animals that decayedNatural Gas - that bubble up from oil
All three of these are flammable and can be burned to boil water to make steam to spin turbines that crank generators to make electricity.
The turbines keep the magnets spinning near the copper coils.Electrons get pushed to our homes through transmission lines giving us a continuous flow of electricity.Fossil Fuels are non-renewable which means we will run out of them someday.They also cause pollution.
There are other energy resources that are renewable and less polluting such as...Wind Turbines, Wave Turbines, Solar Cells and Solar Mirrors, Nuclear Power, and Hydro-Power Plants

Just like static charges of positive and negative, magnets have a North and a South pole and opposites attract while like repels.
Current Electricity
How did we learn about electricty?
http://itp.nyu.edu/~ndl5/electricity/timeline.html#Galvani
To learn how a battery works click here...
http://www.pbs.org/wgbh/amex/edison/sfeature/acdc_insidebattery.html
Also check our...
cell_assignment.ppt

See this power point show with links for more info...
lightning.ppt
Also see this website...
http://www.nationalgeographic.com/features/96/lightning/3.html
Magnetism
The Greeks discovered a natural magnetic rock called magnetite.

If we heat or drop magnets the atoms wiggle out of place and the field weakens.
Just like static charges of positive and negative, magnets have a North and a South pole and opposites attract while like repels.
Current Electricity
To learn how a battery works click here...
http://www.pbs.org/wgbh/amex/edison/sfeature/acdc_insidebattery.html
cell_assignment.ppt

See this power point show with links for more info...
lightning.ppt
Magnetism
The Greeks discovered a natural magnetic rock called magnetite.
This amazing stone helped people create magnetic compass needles for navigation.
The Earth is a gigantic magnet due to a hot liquid iron outer core under the solid crust.
This is called geomagnetism. The earths magnetic field extends far out in space. Animals are affected by the earths magnetic field.
We know that birds and many other animals can migrate north and south. We believe that they have some magnetite crystals in their bodies that came from eating iron in their foods and this creates an internal compass that helps them find their way!
All magnets have an invisible force field that can be made visible. Remember how we used iron filings to make the field visible.
Magnets are stronger at their poles. Each atom inside a magnet is in a position facing the same way. This creates a strong field.
If we heat or drop magnets the atoms wiggle out of place and the field weakens.
Just like static charges of positive and negative, magnets have a North and a South pole and opposites attract while like repels.

Acid Rain.doc
pHTheChemTool.doc
Static Electricity & Lightning
Friction between certain surfaces creates static electricity.
This happens because negative electrons can be scraped off of atoms.
A balloon can steal electrons from atoms of your hair. The balloon becomes negatively charged and sticks to your hair which has the opposite charge of positive. As they stay attracted electrons slowly move back until the neutral surfaces let each other go.
Lightning is caused when water molecules and air particles collide.
See this power point show with links for more info...
lightning.ppt