1. By Liz LaRosa 5 th Grade Science www.middleschoolscience.comwww.middleschoolscience.com 2009 Classifying Matter: Elements, Compounds, and Mixtures

2. Elements pure substance that cannot be separated into simpler substance by physical or chemical means.

3. Elements-examples: Hydrogen – H2 Oxygen – O2 Sodium – Na Chloride -- Cl

4. Compounds--Pure substance composed of two or more different elements joined by chemical bonds

5. Compounds-Examples: Water H20 Hydrogen peroxide H202 Sodium chloride NaCl Carbon dioxide CO2

6. Mixtures -- A combination of two or more pure substances that are not chemically combined. Chem4kids.com

7. Mixtures—examples: Air Rocks Sand Koolaid Salad Pizza

8. BrainPOP movie www.brainpop.com Compounds and mixtures

9. . Compounds Have chemical formulas H2O Have physical and chemical properties different than the elements they are made from -H20 is a liquid but hydrogen and oxygen are gases Are chemical changes and can only be separated by chemical means, not physically Always have the same amounts of elements in it each time -water is H2O and it will always have 2 hydrogen atoms and 1 oxygen atom joined together

10. Mixtures Substances are held together by physical forces, NOT chemical Are physical changes Can be separated physically Each substance keeps its physical properties in the mixture Can have different amounts of a substance in it Chem4kids.com

11. Can you identify the following? You will be shown a series of photos. Tell if each photo represents an item composed of an element, compound, or mixture. Review: An element contains just one type of atom. A compound contains two or more different atoms joined together. A mixture contains two or more different substances that are only physically joined together, not chemically. A mixture can contain both elements and compounds.

12. Element, Compound, or Mixture? Rocks

13. Element, Compound, or Mixture? Rocks

14. Element, Compound, or Mixture? Copper

15. Element, Compound, or Mixture? Copper

16. Element, Compound, or Mixture? Jelly Beans

17. Element, Compound, or Mixture? Jelly Beans

18. Element, Compound, or Mixture? Table Sugar

19. Element, Compound, or Mixture? Table Sugar

20. Element, Compound, or Mixture? Diamond (actually carbon C)

21. Element, Compound, or Mixture? Diamond (carbon)

22. Element, Compound, or Mixture? Tea

23. Element, Compound, or Mixture? Tea

24. Element, Compound, or Mixture? Salt

25. Element, Compound, or Mixture? Salt

26. Element, Compound, or Mixture? Neon Gas

27. Element, Compound, or Mixture? Neon Gas

28. Element, Compound, or Mixture? Salad

29. Element, Compound, or Mixture? Salad

30. Element, Compound, or Mixture? Pure Water

31. Element, Compound, or Mixture? Pure Water

32. Element, Compound, or Mixture? Aluminum

33. Element, Compound, or Mixture? Aluminum

34. Element, Compound, or Mixture? Lemonade

35. Element, Compound, or Mixture? Lemonade

36. Element, Compound, or Mixture? Silver

37. Element, Compound, or Mixture? Silver

38. Element, Compound, or Mixture? Sand

39. Element, Compound, or Mixture? Sand

41. 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