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Mystery Powders

Explore the world of mystery powders through scientific investigation to understand physical and chemical properties. Engage in the scientific method, observe and interpret data, and draw conclusions while experimenting with substances like sugar, salt, and starch.

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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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