Major Points*Matter can exist in 3 states-solid, liquid, and gas.
*Can undergo physical and chemical changes. *A physical change involves a change in one or more physical properties, but no change in composition. *A chemical change transforms a substance into a new substance or substances. *A mixture has variable composition. *A homogeneous mixture has the same properties throughout and you can not see all of its parts. *A heterogeneous mixture does not have the same properties throughout and you can see all of its parts. *You can separate mixtures by filtration and distillation. *There are 2 types of pure substances: elements and compounds. *Elements cannot be broken down chemically into simpler substances. *Compounds can be broken down chemically into elements Online ResourcesMatter:
http://cnx.org/content/m35747/latest/ Physical and Chemical changes: http://cnx.org/content/m39985/latest/ VideosMatter:
http://watchknowlearn.org/Video.aspx?VideoID=35384&CategoryID=1096 Pure Substances and Mixtures: http://watchknowlearn.org/Video.aspx?VideoID=35398 |
Example Problems1. If I burn wood, is that a chemical or physical change?
chemical 2. If I break a piece of glass, is that a chemical or physical change? physical 3. If I pour nail polish remover on you skin and it evaporates quickly, is that a chemical or physical change? physical 4. A piece of paper is cut into smaller pieces, is that a chemical or physical change? physical 5. The sides of a marshmallow are black from the fire, is that a chemical or physical change? chemical 6. The boiling point of water is 100°C, is that an intrinsic or extrinsic property? intrinsic 7. Diamonds are very hard, is that an intrinsic or extrinsic property? intrinsic 8. A rock weighs 23.4g, is that intrinsic or extrinsic? extrinsic 9. Gold is shiny, is that an intrinsic or extrinsic property? intrinsic 10. A glass of water has a volume of 3.4 mL, is that an intrinsic or extrinsic property? extrinsic Activity![]()
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