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Book K – Chapt.1, section 1 Describing matter

Book K – Chapt.1, section 1 Describing matter. Essential Question: What are the two kinds of properties that all matter has?. chemistry The study of the properties of matter and how matter changes. substance A single kind of matter that is pure and has a specific set of properties.

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Book K – Chapt.1, section 1 Describing matter

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  1. Book K – Chapt.1, section 1Describing matter Essential Question: What are the two kinds of properties that all matter has?

  2. chemistryThe study of the properties of matter and how matter changes

  3. substanceA single kind of matter that is pure and has a specific set of properties.

  4. physical propertyA characteristic of a pure substance that can be observed without changing it into another substance.

  5. chemical propertyA characteristic of a pure substance that describes its ability to change into a different substance.

  6. elementA pure substance that cannot be broken down into other substances by chemical or physical means.

  7. atomThe basic particle from which all elements are made.

  8. Bellringer: In three lines, please describe the obvious difference between physical and chemical properties.

  9. chemical bondThe force that holds two atoms together.

  10. moleculeA particle made of two or more atoms bonded together.

  11. compoundA pure substance made of two or more elements chemically combined.

  12. chemical formulaA formula that gives the elements in a compound and the ratio of atoms.

  13. mixtureTwo or more substances that are mixed together but not chemically combined.

  14. heterogeneous mixtureA mixture in which pure substances are unevenly distributed throughout the mixture.

  15. homogeneous mixtureA mixture in which substances are evenly distributed throughout the mixture

  16. solutionAn example of a homogeneous mixture; forms when substances dissolve.

  17. Classifying A metal melts at 450°C. Is this property of the metal classified as chemical or physical? Explain your choice.

  18. When you describe a substance as a solid, a liquid, or a gas, you are stating another physical property. Whether or not a substance dissolves in water is a physical property, too.

  19. Making JudgementsHelium does not react with any other substance. Is it accurate to say that helium has no chemical properties? Explain.

  20. In contrast, a chemical property of gold is that it does not react easily with oxygen or sulfur.

  21. Reviewing How are elements and compounds similar? How do they differ?

  22. Ratios Look at the following chemical formulas: H2O2 and H2O. Do these formulas represent the same compound? Explain.

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