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Mystery Powders

Vocabulary. Mystery Powders. Scientific Method (Review). Question: What do you want to know? Hypothesis: What do you think will happen? Materials: What do you need? Procedure: What will you do? Results: What happens? Conclusion: What did you learn?. Physical Property.

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Mystery Powders

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  1. Vocabulary Mystery Powders

  2. Scientific Method (Review) • Question: What do you want to know? • Hypothesis: What do you think will happen? • Materials: What do you need? • Procedure: What will you do? • Results: What happens? • Conclusion: What did you learn?

  3. Physical Property • The outward appearance or physical characteristic or trait used to identify an object

  4. Chemistry • A science that deals with the composition (what it’s made of), structure (what it looks like), and properties of materials and the way they change

  5. Observe • To notice facts about a substance or event using any of your senses

  6. Infer • To explain something based on observations, to tell how or why something happened • Example: I can infer that it is cold outside because the students are wearing heavy coats, scarves, and mittens.

  7. Data • Factual information used as the basis for reasoning, discussion, or calculating

  8. Record Data • To write down (record) information (data) to use in the future

  9. Summarize Data • To restate the information briefly • Think “Summary” (from reading) of the data

  10. Interpret Data • To draw conclusions from the information obtained or to offer an explanation of the information • Interpret = translate: turn the data into answers

  11. Powder • A ground-up solid

  12. Particles • A very small piece of something • Examples: powders, crystals,dust

  13. Substance • An object or material • Examples: rock, water, paper

  14. Chemical Property • The ability of a substance to change into a new substance with different physical properties

  15. Dissolve • To break up into parts and go into a liquid such as water, the substance seems to disappear

  16. Soluble • The property of a substance that can dissolve

  17. Insoluble • The property of a substance that can not dissolve

  18. Solution • Made when a substance dissolves in a liquid • Example: salt dissolves in water and forms a solution that does not separate without a chemical reaction

  19. Reaction • A response to something, a physical or chemical change

  20. Vinegar • A weak acid solution obtained by fermentation beyond the alcohol stage • Sour tasting liquid made from fruit

  21. Iodine • Deep red, antiseptic liquid used to treat cuts • Poisonous if swallowed • Indicates the presence of starch

  22. Insulation • Prevents the movement of heat from one place to another, keeps warm things warm and cold things cold • Think “insulator” from the electricity unit (keeps electricity where it belongs)

  23. Mixture • A blend of two or more substances that don’t form a new substance

  24. Sugar • Melts and smells like caramel in the heat test • Dissolves in water • Appearance of crystals

  25. Salt • Dissolves in water • Snaps and crackles in heat test • Appearance of crystals

  26. Baking Soda • Fizzes when mixes with vinegar • Turns yellow/orange with iodine

  27. Starch • Turns purple/black with iodine • Smells like burnt toast in heat test • Squeaks when rubbed against cup • Feels smooth between your fingers

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