Investigation 6 melting and dissolving
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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

Investigation 6: Melting and Dissolving

December 4-5


Warm up
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?


Write down complete answer for credit
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


Learning target
Learning Target

I can differentiate between melting and dissolving.


Homework check
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.


Page 97 and 99
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.


Champs
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!


Dissolving and melting
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?


Page 111
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!


Page 113
Page 113

  • Record all your observations.

  • Use a lot of details.


Observations
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.


Observations1
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.


Melting and dissolving
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.


Melting and dissolving1
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.


Conclusions
Conclusions

  • Complete conclusions on page 113.


Champs1
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!


Green textbook page 42
Green Textbook page 42

  • Read pages 42 to 48

  • Answer questions on page 119 in science notebook


Exit slip
Exit slip

  • What are the 3 important ideas of energy transfer?


Champs2
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!!!


Champs3
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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