Changing States Matter can change state if you raise or lower the temperature (nothing new is formed) Solid to a liquid: melting point Liquid to a solid: freezing point Liquid to a gas: evaporation Gas to a liquid: condensation Solids to a gas: sublimation Click the title to view an interactive website. © LoveLearning 2014

Signs of a Chemical Change Clue Examples Changes color Green tomato turns red, cake gets brown in the oven, egg frying Different odor Burning wood, spoiled food Changes temperature without being heated/cooled Rotting leaves in a compost pile become warm Bubbles form Bubbles form when vinegar is mixed with baking soda Gives off gas or gases Burning wood gives off carbon dioxide and water vapor New solid forms Rust is created Click on the title to watch a quick video! © LoveLearning 2014

Physical vs. Chemical Questions to ask yourself: Can it be reversed? Did it create something new? http://www.sciencebob.com/experiments/videos/video-foam1.php © LoveLearning 2014

Bill Nye – Chemical Reactions © LoveLearning 2014

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