EM+Induction

Enduring Understandings
From our music systems to our computer systems to our answering machines, we have come to rely on the ability to store information and retrieve it at a later date. Many of these devices rely on a phenomenon called electromagnetic induction. This section will study the phenomenon and learn how it comes into play in many forms of technology.

Resource Materials:
http://electronics.howstuffworks.com/cassette.htm

http://blog.wired.com/gadgets/2007/05/videothe_imposs.html Hard Drive "Dissection" Kits Online EM Induction Simulation Online Hard-Disk "Dissection" [|Online Decimal to Binary Converter]
 * Text- Science Spectrum**

Instructional Objectives:
//Electromagnetic Induction// //Magnetic Tapes// //Binary Codes//
 * Predict the effects of moving a magnet near a coil, or vice versa.
 * Describe a method for magnetizing a substance with an electromagnet.
 * Describe the coding of sights and sounds into magnetic tapes.

//Reflective Disks// //Flash Memory//
 * Describe the photoelectric effect.
 * Describe the coding of sights and sounds into optical disks.

Essential Learning Activities/Strategies/Technologies:
EM Induction Investigation Cassette Tape Simulation Hard Drive Dissection Bar Code Activity Photocell Investigation (demonstrate photoconductivity with cadmium sulfide cells and multimeters; show [|Dave's Whizzy Periodic Table] for the concept of electron shells; show [|Conductivity phet sim]; refer to [|Cadmium], [|Sulfur], and [|Cadmium sulfide] articles on Wikipedia to show molecules have different properties than their atomic constituents.

Technology Integration:
[| Electromagnetic simulation-PhET]

Prior Learning:
S8.C.2.1 Describe energy sources, transfer of energy, or conversion of energy. S8.C.3.1 Describe the effect of multiple forces on the movement, speed, or direction of an object.
 * S8.C.2.1.1 Distinguish among forms of energy (e.g., electrical, mechanical, chemical, light, sound, nuclear) and sources of energy (i.e., renewable and nonrenewable energy)
 * S8.C.2.1.2 Explain how energy is transferred from one place to another through convection, conduction, or radiation.
 * S8.C.2.1.3 Describe how one form of energy (e.g., electrical, mechanical, chemical, light, sound, nuclear) can be converted into a different form of energy.
 * S8.C.3.1.1 Describe forces acting on objects (e.g., friction, gravity, balanced versus unbalanced).
 * S8.C.3.1.2 Distinguish between kinetic and potential energy.
 * S8.C.3.1.3 Explain that mechanical advantage helps to do work (physics) by either changing a force or changing the direction of the applied force (e.g., simple machines, hydraulic systems).