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Physical & Chemical Changes

Physical & Chemical Changes. Outcomes 11/16 & 11/17. Distinguish between physical and chemical changes Compare calories burned to consumed Work with a partner to create a tasty treat! Leave my area as clean as I found it Hand in: Lab packet (1/student). Clean-up.

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Physical & Chemical Changes

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  1. Physical & Chemical Changes

  2. Outcomes 11/16 & 11/17 • Distinguish between physical and chemical changes • Compare calories burned to consumed • Work with a partner to create a tasty treat! • Leave my area as clean as I found it • Hand in: Lab packet (1/student)

  3. Clean-up • Use a paper towel to clean the butter out of your container and lid • Pour your water/buttermilk in the disposal bucket • ONE partner may check in with Mrs. Ernst for permission to go wash the equipment • Return all CLEAN equipment to front table • Make sure your work area is clean!

  4. Exit Quiz #10 • Do you think that making butter is a physical or a chemical change? • Why do you think so?

  5. Outcomes 11/18 & 11/21 • Define chemical and physical change • Give examples of chemical and physical changes • Decide whether butter-making is a chemical or a physical change • Categorize examples as either chemical or physical change • IP: Solid, Liquid, Gas diagram

  6. Physical Change • Any change in matter that takes a substance from state to state without a change in the composition

  7. Physical Change • Happens when matter changes from one state to another • Happens when you change the size, shape or amount of a sample of matter • Happens when you mix matter that doesn’t react with each other • Doesn’t change the substance (You have the same stuff you started with) • Generally reversible (you can “undo” it)

  8. Chemical Change • Any process where there is a change in the atomic or molecular structure of the substance • One or more substance changing into new substance(s) • Also called a chemical reaction

  9. Chemical Change • Happens when you have a chemical reaction • Atoms rearrange to form new substances • You don’t have the same stuff that you had when you started • Generally not reversible • Once it’s done, it’s done!

  10. Evidence of Chemical Change • Color change • Unexpected temperature change • Gas formation (bubbles) • Formation of a solid from liquid(s) • Change in odor • Flame/combustion

  11. Butter Battle • Chemical or physical change? • Pick a side!

  12. Exit Quiz #11 • Is making butter a physical or chemical change? • Support your answer using the definition

  13. Other examples

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