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Bell Ringer

Bell Ringer. Study for Quiz on Section 2.2 Check your file Turn in your science in the news assignment If you do not have it ready to turn in, see me!. Bell Ringer - Look over your quiz. Look over the ones you missed on your quiz and make sure you understand the right answers.

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Bell Ringer

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  1. Bell Ringer • Study for Quiz on Section 2.2 • Check your file • Turn in your science in the news assignment • If you do not have it ready to turn in, see me!

  2. Bell Ringer - Look over your quiz • Look over the ones you missed on your quiz and make sure you understand the right answers. • Is blue 7. rusts • Is fuzzy 8. explodes in water • Reacts with water 9. is shiny • Melts at 110° 10. reacts with bleach • Is flammable • Has a density of 1g/ml

  3. Unit 2: MatterChapter 2: MatterSection 3: Changes of Matter

  4. Physical Changes • Physical change – change of matter from one form to another without a change in chemical properties • don’t change a substance’s identity • dissolving

  5. Chemical Changes • A change that occurs when one or more substances change into entirely new substances with different properties • No going back! • Battery dying, breathing oxygen, food digested, fruit ripens • Form new substances • Detected by change in color or smell, fizzing or foaming, sound, heat, or light

  6. Mixtures • Homogeneous mixtures – parts in the mixtures are evenly distributed • Heterogeneous mixtures – substances are not evenly distributed

  7. Breaking Down Mixtures • Mixtures can be separated by physical changes • Example) You can pick the mushrooms off a pizza • Compounds must be broken down by chemical changes

  8. Exit slip • What is an example of a physical and chemical change?

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