Key to gravity questions

Gravity & Gravitational Fields

Here are sites for the gravity research:
1. http://coolcosmos.ipac.caltech.edu/ask/300-What-is-gravity-
2. http://www.physics4kids.com/files/motion_gravity.html
3 & 4. http://www.classzone.com/vpg_ebooks/ml_sci_gr8/accessibility/ml_sci_gr8/page_72.pdf
BONUS (if your bonus is #5) http://www.qrg.northwestern.edu/projects/vss/docs/space-environment/1-what-causes-an-orbit.html
5. http://www.qrg.northwestern.edu/projects/vss/docs/space-environment/1-what-causes-an-orbit.html
6. http://www.exploratorium.edu/ronh/weight/
7. http://www.qrg.northwestern.edu/projects/vss/docs/space-environment/1-is-there-gravity-in-space.html or
http://www.qrg.northwestern.edu/projects/vss/docs/space-environment/zoom-grav.html
8. Thinkā€¦ what is another "attractive" (not good-looking, but a pulling) force? Search for that!
9. This is a bonus. I'm not giving you this one. ;)

Gravity (song) - John Mayer parody
Schoolhouse Rock's Victim of Gravity

Magnetic Fields

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The Mystery of Earth's Core Explained (extension video clip)
Maglev Trains Video Clip
Aurora Video Clip
Magnetic Computer Simulation - https://phet.colorado.edu/en/simulation/magnet-and-compass
Magnetic Fields Extension Video Clip

Electric Fields

Balloon Lab Simulation: https://phet.colorado.edu/en/simulation/balloons
Video Clip of Charges on Tape
Bill Nye's Demos of Electric Charges
The Mystery of Lightning - How Lightning Works
How Static Electricity Works
Online Table Hockey: https://phet.colorado.edu/en/simulation/electric-hockey

Electromagnetism

What is an Electromagnet? Video Clip
How to make an electromagnet video clip
Bill Nye's 100 Greatest Discoveries in Science - ELECTROMAGNETISM
How do speakers work?

Speaker Building

Cartoon drawings of step by step instructions

Video of the working speaker
Website with details about building your own speaker