Wednesday 1/26/11 Melting Wax and Sugar DateActivityPage 1/26Melting Wax and Sugar.
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Transcript of Wednesday 1/26/11 Melting Wax and Sugar DateActivityPage 1/26Melting Wax and Sugar.
![Page 1: Wednesday 1/26/11 Melting Wax and Sugar DateActivityPage 1/26Melting Wax and Sugar.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649f2b5503460f94c464e1/html5/thumbnails/1.jpg)
Wednesday 1/26/11
•Melting Wax and Sugar
Date Activity Page
1/26 Melting Wax and Sugar
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Today’s Content Objectives
1.We will investigate whether or not sugar and wax melt completely.
2.We will learn that freezing is when liquids change state to solids.
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Today’s Language Objectives
1.We will read and follow instructions given about the experiment.
2.We will record data and write answers to questions.
3.We will discuss our results.
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Today’s Group Objectives
1.We will work in our table group to complete the experiment, analyze the data and respond to the questions in writing and in discussion.
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Wax and Sugar Melting
• Most of us saw wax melting, but sugar did not melt.
• Do you think sugar can melt?
• What would we need to do to determine whether or not sugar can melt?
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Today’s Experiment
• We will conduct an experiment to determine whether wax and sugar melt using a candle.
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Safety: Flame is approx. 1400C!!!
• Remove papers from area where candle is set.
• Roll up sleeves.• Long hair should be secured.• Avoid touching the hot spoons
and the melted materials.• Wear goggles as long as the
candle is lit.
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Set Up: Job Assignments• 1s—gets the tub, hands out safety
glasses
• 2s—makes aluminum spoon
• 3s—makes aluminum spoon
• 4s—gets sugar and wax
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Clean Up: Job Assignments• 1s—puts safety glasses in tub
• 2s—throws away aluminum spoons
• 3s—returns paper cups to teacher
• 4s—checks tub with teacher, returns tub to its spot
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What does the word melt mean?
• Melting is a change of state from solid to liquid
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Did the wax melt? What is your evidence?
• Yes.
• The wax changed from a solid to a liquid.
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Did the sugar melt? What is your evidence?
• Yes.
• The sugar changed from a solid to a liquid.
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Did the melted wax and sugar stay liquid?
• No, they both changed back into solids.
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Note: Freezing
•When liquids change state from liquid to solid.
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Did the melted wax and sugar freeze? Evidence?
• Yes.
• They changed from a liquid to a solid.
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Do all solids melt? How would you find out?
• Heat them until melt or something else happens.
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Do all solids melt at the same temperature?
• No. Each element has its own melting temperature.
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Do all liquids freeze at the same temperature?
• No. Water freezes at 0C, and wax and butter are solid at room temperature.
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How could you find out if all liquids freeze?
• Cool them until they freeze or something else happens.
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When wax melts, how do the particles change?
• The wax particles don’t change; they stay wax particles. The amount of KE they have changes.
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Why do materials melt when they get hot?
• Heat energy transfers to particles. KE of particles increases until they start to move over and around one another.
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What happens at the particle level when a material freezes?
• KE of particles decreases until they stop moving over and around one another.
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Why is the wax around the wick of your candle solid now?
• Energy transferred from the wax to the surrounding air.
• The KE of the particles decreased until the particles stopped moving over and around each other.
• When they stopped moving, the wax froze.