watershed - area of land that drains, estuary - land drains into the, brackish water - Chesapeake Bay is, graduated cylinder - measures volume, radiation - comes form the Sun, tides - caused by moons position, seasons - caused by Earths tilt, light bulb - gives off thermal energy, amplitude - height of sound wave, nitrogen - 78% of air we breathe, 0 Celsius - water freezes, conduction - cold spoon in ice cream, tissues - cells-___-organs-systems, vacuum - sound CANNOT travel through, radio wave - LONGEST wavelength, motors - use electromagnets, exothermic - example=fire works, endothermic - example=ice pack,

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