From HowStuffWorks.com: Motor - Electric Motor: http://electronics.howstuffworks.com/motor4.htm Touch sensor - Nervous System: http://health.howstuffworks.com/nerve.htm Ultrasonic sensor - Echo Location: http://videos.howstuffworks.com/hsw/6054-exploring-sound-echo-location-video.htm Sound sensor - Sound Frequency: http://videos.howstuffworks.com/hsw/6053-exploring-sound-frequency-video.htm Light sensor - How Light Works: http://science.howstuffworks.com/light3.htm the Future Channels: Robotic Arm using light sensor - http://www.thefutureschannel.com/dockets/science_technology/testing_robotic_hand/ sciencejoywagon.com has a site called "The Physics Zone". This site contains everything you need to know about light and sound waves, frequencies, etc.: http://www.sciencejoywagon.com/physicszone/09waves/ ---------------------------------------------------------------------------------------------------------------------------------- SCIENCE: Standard 1: The Scientific Process: SCIENTIFIC INVESTIGATION: Discover, invent, and investigate using the skills necessary to engage in the scientific process Standard 2: The Scientific Process: NATURE OF SCIENCE: Understand that science, technology, and society are interrelated Standard 6: Physical, Earth and Space Science: NATURE OF MATTER AND ENERGY: Understand the nature of matter and energy, forms of energy (including waves) and energy transformations, and their significance in understanding the structure of the universe Standard 7: Physical, Earth, and Space Sciences: FORCE AND MOTION: Understand the relationship between force, mass, and motion of objects; and know the major natural forces: gravitational, electric, and magnetic |