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Standard Area - TECH: Learning Standards for Technology
(see MST standards under Previous Standard Versions)-
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Introduction - MST4.I.PS4.Introduction:
An underlying principle of all energy use is the Law of Conservation of Energy. Simply stated, energy cannot be created or destroyed.
Energy can be transformed, one form to another. These transformations produce heat energy. Heat is a calculated value which includes the temperature of the material, the mass of the material, and the type of the material. Temperature is a direct measurement of the average kinetic energy of the particles in a sample of material. It should be noted that temperature is not a measurement of heat.
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Major Understandings - MST4.I.PS4.4a:
Different forms of electromagnetic energy have different wavelengths. Some examples of electromagnetic energy are microwaves, infrared light, visible light, ultraviolet light, X-rays, and gamma rays. -
Major Understandings - MST4.I.PS4.4b:
Light passes through some materials, sometimes refracting in the process. Materials absorb and reflect light, and may transmit light. To see an object, light from that object, emitted by or reflected from it, must enter the eye. -
Major Understandings - MST4.I.PS4.4c:
Vibrations in materials set up wave-like disturbances that spread away from the source. Sound waves are an example. Vibrational waves move at different speeds in different materials. Sound cannot travel in a vacuum. -
Major Understandings - MST4.I.PS4.4d:
Electrical energy can be produced from a variety of energy sources and can be transformed into almost any other form of energy. -
Major Understandings - MST4.I.PS4.4e:
Electrical circuits provide a means of transferring electrical energy. -
Major Understandings - MST4.I.PS4.4f:
Without touching them, material that has been electrically charged attracts uncharged material, and may either attract or repel other charged material. -
Major Understandings - MST4.I.PS4.4g:
Without direct contact, a magnet attracts certain materials and either attracts or repels other magnets. The attractive force of a magnet is greatest at its poles.
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