phys_and_chem_changes

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Information about phys_and_chem_changes
Education

Published on March 25, 2009

Author: tmalefyt

Source: authorstream.com

Physical and Chemical Changes : How to tell the difference Physical and Chemical Changes Physical Change : Physical Change Substance may seem different, but the way the atoms link up is the same. It’s a physical change if : It’s a physical change if It changes shape or size It dissolves. Slide 4: It changes phase (freezes, boils, evaporates, condenses) It’s a physical change if... Chemical Change : Changes the way the molecules link up Makes new substances Chemical Change It’s a chemical change if…. : It’s a chemical change if…. It burns Temperature changes without heating/cooling It’s a chemical change if... : It’s a chemical change if... It bubbles (makes a gas) It’s a chemical change if... : It’s a chemical change if... It changes color It forms a precipitate What kind of change is it if someone... : What kind of change is it if someone... Tears up paper? Physical change Mixes salt and water? Physical change What kind of change is it if someone... : What kind of change is it if someone... Burns paper? Chemical change Evaporates salt water? Physical change What kind of change is it if someone... : What kind of change is it if someone... Mixes vinegar and baking soda? Chemical change

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