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HOW DOES MATTER CHANGE?

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HOW DOES MATTER CHANGE?

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  1. HOW DOES MATTER CHANGE? Investigation Chapter 13 Lesson 2 Pages E50-E51

  2. Objectives • Compare and contrast physical and chemical changes • Recognize that a physical change does not involve a change in the type of matter undergoing change • Recognize that the same amount of matter exists before and after a chemical change takes place

  3. Why it matters. . . • What happens when an ice cube melts? • What happens to iron in the rain? • Where does the matter in a piece of wood go when the wood is burned?

  4. Why it matters. . . • When you shape wood with a saw, you have only changed its physical properties • If you burn the wood, it is a chemical change in properties

  5. Lets Review

  6. Physical Properties • Measured or detected by the senses • Include: State, Size, Odor, Color Length, Mass, Volume

  7. Chemical Properties • Ability or tendency of a material to change its chemical makeup • Atoms and molecules create a new arrangement and a new material with different properties from the original material is formed.

  8. Physical or Chemical?

  9. Breaking an egg? Physical

  10. Fireworks exploding? Chemical

  11. Cutting paper? Physical

  12. Cooking an egg? Chemical

  13. Boiling water? Physical

  14. Sharpening a pencil? Physical

  15. Do you understand?

  16. GOT IT

  17. Prepare to Investigate!

  18. Inquiry Skill . . . • COMPARE • When you compare, you determine how two or more organisms, objects, or events are similar and how they are different.

  19. Set up your investigation sheet

  20. SCIENCE INVESTIGATION •            Chapter_____Lesson______ •     Name/Names:__________________________ •     Date:__________________ • What is the Question?  What is the Problem? • Hypothesis: • Materials: • Procedures: • Data: •     6.  Conclusion/Results

  21. COMPARE YOU WILL BE COMPARING AND CONTRASTING THE PROPERTIES OF MILK AND VINEGAR

  22. Question or Problem? • What happens when milk and vinegar mix?

  23. HYPOTHESIZE • Write your hypothesis on your investigation paper. • What do you predict will happen when milk and vinegar mix?

  24. Materials • Goggles • Two jars • Skim Milk • Vinegar

  25. SAFETY!!!!! Wear goggles during this investigation!!!

  26. PROCEDURES

  27. Procedures: • {WRITE: See attached sheet} • You will be given a copy of the procedures to staple to your paper.

  28. COLLABORATE • Work with your partner. • Create a chart large enough for you to include written observations • You can create this chart on the back of your investigation sheet • Example is on the next slide  • On your investigation sheet under 5. Data write: See back of paper

  29. Data Chart to Create

  30. OBSERVE • Pour 100mL of milk into one jar • Pour 100mL of vinegar into the other jar • Study the properties of each liquid • Record your observations on your chart

  31. OBSERVE • Tightly cover the jar of milk and shake vigorously • Set the jar back on your table • Observe how the milk returns along the sides to the bottom of the jar • Record your observations

  32. OBSERVE • Tightly cover the jar of vinegar and shake vigorously • Set the jar back on your table • Observe how the milk returns along the sides of the bottom of the jar • Record your observations

  33. EXPERIMENT • Uncover the jars and carefully pour a small amount of vinegar into the milk. • Observe the interaction of the two liquids. • Record your observations.

  34. EXPERIMENT • Pour the rest of the vinegar into the milk. • Stir the mixture and allow it to settle. • Record your observations.

  35. EVALUATE RESULTS • Discuss with your lab partner the chart you created. • Compare and Contrast the milk and vinegar properties when separate and then when mixed. • Record your conclusion of your hypothesis on your investigation sheet (#6)

  36. EXPLAIN RESULTS • At your group, discuss your results with each other.

  37. QUESTION? • What kind of change took place when milk and vinegar were combined? • CHEMICAL CHANGE • The result was a new substance

  38. WOW • You are now an expert in Chemical and Physical Change. • Well, if you are not sure don’t worry. As we read the next lesson you should have a lot more confidence! • Way to go!!!!!!