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Investigation 6 : Melting and Dissolving

Investigation 6 : Melting and Dissolving. December 4-5. Warm Up. Ben and Jonah are making hot cocoa. They used 500 ml of milk. The temperature of the milk was 12 ˚C. After they heated it, the milk was 64 ˚C. How many calories of heat transferred to the milk?.

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Investigation 6 : Melting and Dissolving

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  1. Investigation 6: Melting and Dissolving December 4-5

  2. Warm Up • Ben and Jonah are making hot cocoa. They used 500 ml of milk. The temperature of the milk was 12 ˚C. After they heated it, the milk was 64 ˚C. How many calories of heat transferred to the milk?

  3. Write down complete answer for credit. Cal= m X ∆T m= 500 ml=500g ∆T=64 ˚C -12 ˚C =52˚C Cal= 500g x 52˚C = 26,000 cal

  4. Learning Target I can differentiate between melting and dissolving.

  5. Homework Check • Open your notebook to page 97 • We are going to correct the work. • This will be used as part of a notebook grade so write down all answers.

  6. Page 97 and 99 • One set of answers per table. • Everyone at the table must write all answers. • You must copy all the work, not just the final answer. • Raise your hand when finished.

  7. CHAMPS C- Only at your group. H-Raise your hand if you have a question. A- Sitting up, working on answers. M-None. P- All students working on pages 97 and 99. Success for all students!

  8. Dissolving and Melting • How are dissolving and melting different? • How are they the same? • How would you melt a substance? • How would you dissolve a substance?

  9. Page 111 • You will work with a cup of hot water and cold water. • You will have 2 foil cups floating on the water. • You will have 4 M&Ms to use. • DO NOT SQUASH, EAT, THROW!! • Place one candy in each foil cup and one in the water. • Do not stir or touch the candy!

  10. Page 113 • Record all your observations. • Use a lot of details.

  11. Observations • What happened to the colored coating? • It dissolved in both hot and cold water and it stayed in place in the foil cups. • Where did the colored coating go? • In the water. It spread throughout the water.

  12. Observations • What happened to the candies in the foil cups? • The one in the cup over hot water cracked and got soft and gooey. The one over cold did not change. • What happened to the chocolate in the water? • The one in hot water got soft and gooey, the one in cold water stayed hard.

  13. Melting and Dissolving • Melting is when a solid material changes to liquid. • The change is caused by heat. • When the particles have enough KE, they start to move past one another as a liquid.

  14. Melting and Dissolving • Dissolving is when a solid substance is placed in a liquid and particles of the solid substance break away and move into the liquid. • A solution is made of particles of a substance mixed uniformly with particles of the liquid in which it is dissolved.

  15. Conclusions • Complete conclusions on page 113.

  16. CHAMPS C- None H-Raise your hand A- Sitting up, recording your answers M-None P- All students working on answering Success for all students!

  17. Green Textbook page 42 • Read pages 42 to 48 • Answer questions on page 119 in science notebook

  18. Exit slip • What are the 3 important ideas of energy transfer?

  19. CHAMPS C- Only with your group. Only on topic. H- Check in book, notes, and ask your group members. Raise your hand if you have a question A- Answering questions on page 87. M- None P- All students working on questions. Success for all!!!

  20. CHAMPS C- None H-Raise your hand if you have a question. A- Sitting up, working on quiz M-None P- All students sitting quietly correcting quiz. Success for all students!

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