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WARM UP

WARM UP. What do the words football, baseball, popcorn, and pancake have in common with chemistry?. Classifying Matter: Elements, Compounds, and Mixtures. USE YOUR NOTES! FILL IN THE BLANKS!. Compounds.

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WARM UP

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  1. WARM UP What do the words football, baseball, popcorn, and pancake have in common with chemistry?

  2. Classifying Matter:Elements, Compounds, and Mixtures USE YOUR NOTES! FILL IN THE BLANKS!

  3. Compounds Pure substance composed of two or more different elements joined by chemical bonds. • Has a chemical formula. The subscript (small number) tells you how many of that element are needed. • Made of elements in a specific ratio that are always the same • Can only be separated by chemicalmeans, not physically H2O NaCl CO2

  4. Mixtures • A combination of two or more pure substances that are not chemically combined. • No chemical change takes place • Each item retains it’s own properties in the mixture. • They can be separated physically with time, or pressure. Chem4kids.com

  5. Mixtures vs. Compounds http://studyjams.scholastic.com/studyjams/jams/science/matter/elements-and-compounds.htm

  6. Can you identify the following? Tell me is the item in the photo is an element, compound, or mixture. (14 photos) • element : contains just one type of atom. • compound : contains two or more different atoms chemically joined together. • mixture : contains two or more different substances that are only physically joined together, not chemically.

  7. Element, Compound, or Mixture? Rocks

  8. Element, Compound, or Mixture? Rocks

  9. Element, Compound, or Mixture? Copper

  10. Element, Compound, or Mixture? Copper Cu

  11. Element, Compound, or Mixture? Jelly Beans

  12. Element, Compound, or Mixture? Jelly Beans

  13. Element, Compound, or Mixture? Table Sugar

  14. Element, Compound, or Mixture? Table Sugar C12H22O11

  15. Element, Compound, or Mixture? Diamond

  16. Element, Compound, or Mixture? Diamond C

  17. Element, Compound, or Mixture? Tea

  18. Element, Compound, or Mixture? Tea

  19. Element, Compound, or Mixture? Salt

  20. Element, Compound, or Mixture? NaCl Salt

  21. Element, Compound, or Mixture? Neon Gas

  22. Element, Compound, or Mixture? Ne Neon Gas

  23. Element, Compound, or Mixture? Salad

  24. Element, Compound, or Mixture? Salad

  25. Element, Compound, or Mixture? Pure Water

  26. Element, Compound, or Mixture? Pure Water H2O

  27. Element, Compound, or Mixture? Aluminum

  28. Element, Compound, or Mixture? Aluminum Al

  29. Element, Compound, or Mixture? Lemonade

  30. Element, Compound, or Mixture? Lemonade

  31. Element, Compound, or Mixture? Silver

  32. Element, Compound, or Mixture? Silver Ag

  33. Element, Compound, or Mixture? Sand

  34. Element, Compound, or Mixture? Sand

  35. Notes • Detailed notes are located at: http://www.middleschoolscience.com/elements-compounds-mixtures-notes-isn.pdf • Flow Chart: http://www.middleschoolscience.com/matter-flow-chart-isn.pdf

  36. Is a Glow Stick Compound or Mixture? • How it works: Glow sticks give off light when two solutions are mixed. The sticks consist of a small, brittle container within a flexible outer container. Each container holds a unique solution. When the outer container is flexed, the inner container breaks, allowing the solutions to combine, causing the necessary chemical reaction. After breaking, the tube is shaken to thoroughly mix the two components

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