Matter:
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Electricity:
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Friction:
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Friction - Interactives, Games, Experiments, Information:
http://www.bbc.co.uk/schools/scienceclips/ages/8_9/friction.shtml
http://phet.colorado.edu/sims/html/friction/latest/friction_en.html
http://www.dkfindout.com/us/science/forces-and-motion/friction/
http://carrotsareorange.com/friction-experiments-for-kids/
http://www.learninggamesforkids.com/motion-games/friction-ramp.html
Friction Video Clips:
http://easyscienceforkids.com/best-friction-video-for-kids/
https://science360.gov/obj/video/89c70f56-8885-46a0-9997-
82ebfa025127/science-winter-olympics-science-friction
Friction - Interactives, Games, Experiments, Information:
http://www.bbc.co.uk/schools/scienceclips/ages/8_9/friction.shtml
http://phet.colorado.edu/sims/html/friction/latest/friction_en.html
http://www.dkfindout.com/us/science/forces-and-motion/friction/
http://carrotsareorange.com/friction-experiments-for-kids/
http://www.learninggamesforkids.com/motion-games/friction-ramp.html
Friction Video Clips:
http://easyscienceforkids.com/best-friction-video-for-kids/
https://science360.gov/obj/video/89c70f56-8885-46a0-9997-
82ebfa025127/science-winter-olympics-science-friction