Wooden handle. Because copper is a great conductor so it will burn. my hand when heated, but wood is not a conductor so it'll be safer.
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1 Annotation Summary 46 annotations on 4 pages by haha4176 x46 1. Two pots have been sitting on the stove for a while. One pot has a copper handle and the other has a wooden handle. Which handle would you rather touch? Why? Wooden handle. Because copper is a great conductor so it will burn my hand when heated, but wood is not a conductor so it'll be safer. #1 p.1 burner, but how does the soup at the top get hot? Because the hot particles goes up and cool particles comes down due to the, and when the cool particles gets hot, they goes up again and keep rotates. Gizmo Warm-up #2 p.1 1. Use the sliders to make one flask hotter than the other. Click Play ( ). What happens? The temperature between two flasks tries to even out. #3 p.1 represent? changes of the temp. of the blue flask over time A. The blue curve represents B. The yellow curve represents changes of the temp. of the yellow flask over time 3. What is the final temperature of the top flask? 52.5 C 47.5 C Bottom flask? #4 p.1 1. Observe: Run the Gizmo twice once with a Solid chunk of separating the liquids, and once with a Solid chunk of Stone. Watch how quickly the temperatures of the liquids change in both cases. (Note: This solid chunk keeps the liquids from mixing.) evens out the temperature of the flasks way faster than stone. 2. Form hypothesis: A conductor allows heat to flow easily, while an insulator resists heat flow. In general, what kinds of materials do you think are good conductors? I think metals are good conductors. #5 p.2 3. Predict: Of the six substances in the Gizmo, which ones will allow the fastest temperature change in the two flasks? 4. Experiment: Experiment with all six Solid chunks. For each, click forward ( ) and #6 p.2 Solid copper 95 C 5 C 95 C 5 C Solid lead 95 C 5 C Solid stone 95 C 5 C Solid glass 95 C 5 C Solid rubber 95 C 5 C 50.3 C 49.7 C 51.1 C 79.1 C 93.6 C 94.5 C 95 C 48.9 C 20.9 C 6.4 C 5.5 C 5 C 5. Analyze: What substances conducted heat the best? Because the temperature of both liquids in the flasks became How do you know? equal the fastest. 6. Draw conclusions: What do the best conductors have in common? They are in metal families. #7 p.2 situations does work best? 1. Observe: The Hollow pipe allows the water in each flask to move around and mix. Try several experiments with different temperatures in the top and bottom flasks. Color of the two flasks mixes and creates A. Describe what you see: #8 p.3 The yellow and blue color mixes and forms #9 p.3 If the warmer water is below the cold water, then the times the water mixes slowly? happens quicker because the hot water tries to go up and cold water tries to go down, eventually mixing together faster than the opposite situation. 3. Experiment: Predict the results of each experiment by writing fast or slow in the predictions column. Test your predictions on the Gizmo, and record the actual results. #10 p.3 95 C 5 C 5 C 95 C (predictions) (actual results) #11 p.3 4. Analyze: How do the positions of the hot and cold water affect the speed of? When the hot water is located at the bottom, it will speed up the because hot particles will go up and cold particles will come down. #12 p.3 Rise. Because cold particles are more denser than hot particles. #13 p.3 Activity C: Set the s of the top flask to Conduction vs. and the bottom flask to. 2. Form hypothesis: Heat Get can the Select be Gizmo transferred Gold ready: from by the conduction dropdown or list.. Activity C: A. Which process do you Set the think Initial is quicker? temperatures of the top flask to Question: Conduction Which vs. works more quickly, conduction or? and the bottom flask to. Because the particles are having direct contact 1. Observe: B. Why Experiment do you think with this Select a Hollow is so? Gold from the dropdown list. pipe of Gold and a Solid chunk of Gold separating the flasks. Compare during the how, quickly heat is while exchanged. there's a medium in conduction. Question: Which works more quickly, conduction or? Form Observe: hypothesis: Experiment Heat with can a be Hollow transferred pipe of by Gold conduction and a Solid or. chunk of Gold separating the 3. flasks. Experiment: Compare For each how quickly of the situations heat is exchanged. below, record the temperatures after 100 seconds. A. Which process do you think is quicker? #14 p.4 2. Form B. hypothesis: Why do you Heat think can this be is transferred so? by conduction or. A. Which process do you think is quicker? 100 sec. temp. 100 sec. temp. B. Why do you think (top this flask) is so? 3. Experiment: For each of the situations below, record the temperatures 40.3 after seconds. Initial temp. Initial temp. 100 sec. 50 temp. 100 sec. 50 temp. (top flask) (bottom flask) (top 59.7 flask) (bottom 40.3flask) 3. Experiment: For each of the situations below, record the temperatures after 100 seconds. Hollow gold Initial temp. Initial temp. 100 sec. temp. 100 sec. temp. #15 p.4 4. Draw conclusions: Does always work more quickly than conduction? Explain can work faster or slower depending on it's position. 4. Draw conclusions: Does always work more quickly than conduction? Explain #16 p.4 Why do you think this was the case? Why do you think this was the case? Position doesn't matter for conduction, but it matters for. #17 p.4
2 Name: Date: Student Exploration: Conduction and Vocabulary: conduction, conductor,, insulator Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Two pots have been sitting on the stove for a while. One pot has a copper handle and the other has a wooden handle. Which handle would you rather touch? Why? Wooden handle. Because copper is a great conductor so it will burn my hand when heated, but wood is not a conductor so it'll be safer. burner, but how does the soup at the top get hot? Because the hot particles goes up and cool particles comes down due to the, and when the cool particles gets hot, they goes up again and keep rotates. Gizmo Warm-up The Conduction and Gizmo shows two flasks of colored water, one blue and one yellow. Select and Solid chunk from the dropdown lists. (This means the two flasks are separated by a solid piece of copper, and the two liquids cannot touch each other.) 1. Use the sliders to make one flask hotter than the other. Click Play ( ). What happens? The temperature between two flasks tries to even out. represent? changes of the temp. of the blue flask over time A. The blue curve represents B. The yellow curve represents changes of the temp. of the yellow flask over time 3. What is the final temperature of the top flask? 52.5 C 47.5 C Bottom flask?
3 Activity A: Conduction Click Reset ( ). Set the of the top flask to 95 C and the bottom flask to 5 C. Question: Conduction is the transfer of heat from one object to another by direct contact. Which materials conduct heat most easily? 1. Observe: Run the Gizmo twice once with a Solid chunk of separating the liquids, and once with a Solid chunk of Stone. Watch how quickly the temperatures of the liquids change in both cases. (Note: This solid chunk keeps the liquids from mixing.) evens out the temperature of the flasks way faster than stone. 2. Form hypothesis: A conductor allows heat to flow easily, while an insulator resists heat flow. In general, what kinds of materials do you think are good conductors? I think metals are good conductors. 3. Predict: Of the six substances in the Gizmo, which ones will allow the fastest temperature change in the two flasks? 4. Experiment: Experiment with all six Solid chunks. For each, click forward ( ) and then, after about 500 seconds, Pause ( ). Record the temperature of each flask. Solid copper 95 C 5 C 95 C 5 C Solid lead 95 C 5 C Solid stone 95 C 5 C Solid glass 95 C 5 C Solid rubber 95 C 5 C 50.3 C 49.7 C 51.1 C 79.1 C 93.6 C 94.5 C 95 C 48.9 C 20.9 C 6.4 C 5.5 C 5 C 5. Analyze: What substances conducted heat the best? Because the temperature of both liquids in the flasks became How do you know? equal the fastest. 6. Draw conclusions: What do the best conductors have in common? They are in metal families.
4 Activity B: Click Reset. Select Glass and Hollow pipe in the dropdowns. Question: is the transfer of heat by the movement of matter. In what situations does work best? 1. Observe: The Hollow pipe allows the water in each flask to move around and mix. Try several experiments with different temperatures in the top and bottom flasks. Color of the two flasks mixes and creates A. Describe what you see: The yellow and blue color mixes and forms If the warmer water is below the cold water, then the times the water mixes slowly? happens quicker because the hot water tries to go up and cold water tries to go down, eventually mixing together faster than the opposite situation. 3. Experiment: Predict the results of each experiment by writing fast or slow in the predictions column. Test your predictions on the Gizmo, and record the actual results. 95 C 5 C 5 C 95 C (predictions) (actual results) 4. Analyze: How do the positions of the hot and cold water affect the speed of? When the hot water is located at the bottom, it will speed up the because hot particles will go up and cold particles will come down. Rise. Because cold particles are more denser than hot particles.
5 Activity C: Conduction vs. Set the s of the top flask to and the bottom flask to. Select Gold from the dropdown list. Question: Which works more quickly, conduction or? 1. Observe: Experiment with a Hollow pipe of Gold and a Solid chunk of Gold separating the flasks. Compare how quickly heat is exchanged. 2. Form hypothesis: Heat can be transferred by conduction or. A. Which process do you think is quicker? Because the particles are having direct contact B. Why do you think this is so? during the, while there's a medium in conduction. 3. Experiment: For each of the situations below, record the temperatures after 100 seconds. 100 sec. temp. 100 sec. temp Draw conclusions: Does always work more quickly than conduction? Explain can work faster or slower depending on it's position. Why do you think this was the case? Position doesn't matter for conduction, but it matters for.
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