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Arrangement of Matter

Arrangement of Matter. Unit 2 – Continued 7 th Grade Science. water : plants :: host : . party restaurant game show parasite. IV. Properties of Matter. A. Physical Properties 1. Mass (weight) – Amount of matter in an element or object. 2. Volume – The space an object takes up.

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Arrangement of Matter

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  1. Arrangement of Matter Unit 2 – Continued 7th Grade Science

  2. water : plants :: host : • party • restaurant • game show • parasite

  3. IV. Properties of Matter A. Physical Properties 1. Mass (weight) – Amount of matter in an element or object. 2. Volume – The space an object takes up.

  4. A. Physical Properties 3. Density – How much mass there is in a certain volume Formula – D = M/V

  5. A. Physical Properties 4. Boiling Point – The temperature at which a substance boils. 5. Melting Point – The temperature at which a substance melts. 6. State of Matter – Solid, Liquid, or Gas

  6. B. Chemical Properties • Burning • Radioactivity • Rotting • Rusting • Curdling

  7. V. How Can Matter Be Changed? A. Physical vs. Chemical Change 1. Physical Change - Change from one state to another state. Does not change the original form. NO NEW SUBSTANCE! 2. Chemical Change - Change to form a NEW SUBSTANCE…CANNOT BE REVERSED!

  8. Physical Change Words • Cut • Tear • Fold • Paint • Melt • Boil • Evaporate • Sublimate • Grind

  9. Chemical Change Words • Burning • Rotting • Rusting • Curdling • Reacting • Radioactive

  10. C. Signs of Chemical Change • Heat given off • Color change • Smell • Light given off • Bubbles form • Heat required for the reaction • Precipitate forms (solid formed from reaction) • New Substance forms

  11. D. Example of a Chemical Change CaCl2 + 2 Na HCO3 = CaCO3 + 2 NaCl + H Is it balanced? How can you check?

  12. Which is an example of a physical change? • An apple cut in half • An apple rotting • An apple baking • An apple ripening

  13. Which is an example of a chemcial change? • Ice melting • Oil boiling • Water condensing • Milk spoiling

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