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Understanding Physical and Chemical Changes: Properties, Evidence, and Memorable Acronyms

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Explore the differences between physical and chemical changes through engaging activities and thought-provoking examples. Learn to identify various changes such as tearing paper, burning wood, and cooking a cake. Delve into chemical properties of substances with relatable questions, and discover the five key evidences of chemical changes: precipitate, color change, odor, gas production, and temperature change. Enhance your memory with creative acronyms to help you recall essential concepts in science.

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Understanding Physical and Chemical Changes: Properties, Evidence, and Memorable Acronyms

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  1. 9/19 Activities and Notes

  2. WARMUP: To yourself, answer if the examples are physical changes or chemical changes • Tearing paper • Burning paper • Breaking wood • Campfire • Mixing kool aid • Cooking a cake Physical change Chemical change Physical change Chemical change Physical change Chemical change

  3. Property or Change? • Boiling point • 2 different liquids mix  bubbles • Food coloring in water • Burning an egg • It has a yellow color • It produced a smell Property Change Property Change Property Change

  4. Which of the following is an example of a chemical property of water? • A. Boils at 100 C • B. Is transparent • C. Has no odor • D. Reacts with calcium Is it still water (H2O) Transparent = see through/clear No smell Reacts = chemical reaction

  5. Which of the following is an example of a physical property of hydrogen? It • A. Is less dense than air • B. Reacts with oxygen • C. Is highly flammable • D. Forms hydrochloric acid PHYSICALPROPERTY

  6. What are the 5 evidences of a chemical change? • Precipitate • Color change • Odor/smell • Gas produced • Temperature change

  7. What is an acronym? What about a phrase to help you remember things • D.A.R.E • C.S.I. • Please excuse my dear aunt sally • Every Good Boy Does Fine • Kings play chess on fat guys stomachs • “Pirates Can Obtain Great Treasures”

  8. Come up with an acronym to help you remember these 5 changes Osos Can Produce Grande Turds Temperature change Color change Precipitate Odor/smell Gas produced

  9. Draw this

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