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Presented by Karen Compton, Jane Smith and Claudia Wallace in the ACT2 stand at CAST2010 in Houston, Texas

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  1. 1. Chemistry Assessment<br />Eligible Texas Essential<br />Knowledge and Skills<br />Texas Education Agency<br />Student Assessment Division<br />September 2010<br />
  2. 2. Readiness standardshave the following characteristics.<br /><ul><li>They are essential for success in the current grade or course.
  3. 3. They are important for preparedness for the next grade or course.
  4. 4. They support college and career readiness.
  5. 5. They necessitate in-depth instruction.
  6. 6. They address broad and deep ideas.</li></ul>Texas Education Agency<br />Student Assessment Division<br />September 2010<br />
  7. 7. Supporting standardshave the following characteristics.<br />Although introduced in the current grade or course, they may be emphasized in a subsequent year.<br />Although reinforced in the current grade or course, they may be emphasized in a previous year.<br />They play a role in preparing students for the next grade or course but not a central role.<br />They address more narrowly defined ideas.<br />Texas Education Agency<br />Student Assessment Division<br />September 2010<br />
  8. 8. TEA is implementing a number of changes that should serve to test knowledge and skills in a deeper way.<br />Tests will contain a greater number of items that have a higher cognitive complexity level.<br />Items will be developed to more closely match the cognitive complexity level evident in the TEKS.<br />In science, process skills will be assessed in context, not in isolation, which will allow for a more integrated and authentic assessment of these content area.<br />In science, the number of open-ended (griddable) items will increase to allow students more opportunity to derive an answer independently.<br />Texas Education Agency<br />Student Assessment Division<br />September 2010<br />
  9. 9.
  10. 10. Matter<br />
  11. 11.
  12. 12. Prior Knowledge<br />Properties of solids, liquids, and gases<br />Phase Changes<br />Pure substances vs mixtures<br />Physical vs chemical changes<br />
  13. 13. Engage<br />Bags with Balls<br />
  14. 14. What should be taught…<br /> Properties of the phases of matter are essential prior knowledge for understanding gas relationships, kinetics and intermolecular forces<br />Compressibility<br />Structure<br />Shape<br />Volume<br />
  15. 15. What should be taught…<br />Phase diagrams<br />Heating curves<br />
  16. 16. Heating Curves<br />
  17. 17. Phase Diagrams<br />On the following phase diagram, label: solid, liquid, gas, triple point, and critical point; use the phase diagram to answer the 4 questions which follow. <br />1) What is the freezing point of this substance at 1 atmosphere? ________ <br />2) What is the boiling point of this substance at 1 atmosphere? ________<br />
  18. 18. What should be taught…<br />Classifying matter based on the characteristics of pure substances vs mixtures<br />Classifying matter based on the characteristics of elements vs compounds (CCRS)<br />Separation techniques (CCRS)<br />
  19. 19. Classifying mixtures as homogeneous or heterogeneous (CCRS)<br />Which mixtures are heterogeneous?<br />What do they look like?<br />Oil and water<br />Salt and water<br />Lead pellets and water<br />Sand and water<br />Vinegar and water<br />
  20. 20. Separation Techniques (CCRS)<br />Mixtures can be separated by physical methods like: distillation, filtering, chromatography<br />Compounds can be separated by chemical changes which generally require energy like: heating, electrolysis<br />
  21. 21. What should be taught…<br />Physical vs chemical properties<br />Physical vs chemical changes<br />Intensive vs extensive / Intrinsic (CCRS)<br />
  22. 22. Physical and Chemical<br />Properties<br />Melting point and boiling point<br />Density<br />Changes<br />Phase changes<br />Dissolving<br />
  23. 23. Density<br /> A block of maple wood with a volume of 4.05 cubic centimeters and a density of 0.67 g/cm3 is sawed in half. The density of the two smaller blocks is now<br />one-fourth the original density.<br />one-half the original density.<br />two times the original density.<br />the same as the original density.<br />An intensive (intrinsic) property<br /> A ratio of 2 extensive properties: <br />mass & volume<br />
  24. 24. Identify the property described as physical/chemical and extensive/intensive.<br />40.0 grams of sugar is dissolved in every 2 cups of Kool-aid. P E<br />A copper pan left in water for 4 weeks shows signs of rusting. C I<br />
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