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Sagot :
Yes this could be true.
Materials:
-Freezer
-3 bowls of equal size and shape
-Sticky labels
-Marker
-Water
-Measuring cup
-Thermometer
-Notebook
-Pencil
Procedure:
1. Clear enough room in your freezer for the three bowls. You need to be able to put them in the freezer at exactly the same time, so you don't want to be moving your frozen food and drinks around later.
2. Think about what you know about ice. What temperature is water right before it freezes? You probably usually take baths in warm water. How quickly does the water turn cold when you're in the tub?
3.After considering different temperatures of water and ice, make a guess—called a hypothesis—answering the question: Does hot water freeze faster than cold water?
4. Write your hypothesis in your notebook, including whether you think the hot, warm, or cold water would freeze first and why.
5. Using your marker, write Hot on one of your sticky labels. Repeat with labels for Warm and Cold.
6. Place the sticky labels on each of the three bowls, using one per bowl. The labels will help you keep track of which bowl holds which temperature of water.
7. With your pencil, draw three columns in your notebook. Label the first column Hot, the second one Warm and the third Cold.
8.With the help of an adult, heat 1 cup of water to 100 degrees Fahrenheit. Pour it into the Hot bowl, being careful not to burn yourself.
9. Heat 1 cup of water to 70 degrees Fahrenheit, and pour it into the Warm bowl.
10.Fill the Cold bowl with water that's 40 degrees Fahrenheit.
11. Immediately place all three bowls in the freezer.
12. Record the starting temperatures in the correct columns of your notebook.
13. Open the freezer door every 10 minutes and take the temperature of the water in each bowl with a thermometer. Record the temperature in your notebook.
14. Repeat Step 13 until all three bowls have frozen over.
15. Compare the information in each of the three columns in your notebook. Was your hypothesis correct?
RESULTS/DATA: (claim/answer)The bowls that contain the hot and warm water will freezer faster than the bowl that is filled with cold water. (Evidence) all water evaporates, which means that the liquid (water) "disappears" and becomes a vapor, or gas. (the transfer of heat within the water as it moves around) plays a part in helping hot water freeze more quickly than the bowl of cold water. The hot water has more convection currents than cold water, causing it to cool down much more quickly.
Materials:
-Freezer
-3 bowls of equal size and shape
-Sticky labels
-Marker
-Water
-Measuring cup
-Thermometer
-Notebook
-Pencil
Procedure:
1. Clear enough room in your freezer for the three bowls. You need to be able to put them in the freezer at exactly the same time, so you don't want to be moving your frozen food and drinks around later.
2. Think about what you know about ice. What temperature is water right before it freezes? You probably usually take baths in warm water. How quickly does the water turn cold when you're in the tub?
3.After considering different temperatures of water and ice, make a guess—called a hypothesis—answering the question: Does hot water freeze faster than cold water?
4. Write your hypothesis in your notebook, including whether you think the hot, warm, or cold water would freeze first and why.
5. Using your marker, write Hot on one of your sticky labels. Repeat with labels for Warm and Cold.
6. Place the sticky labels on each of the three bowls, using one per bowl. The labels will help you keep track of which bowl holds which temperature of water.
7. With your pencil, draw three columns in your notebook. Label the first column Hot, the second one Warm and the third Cold.
8.With the help of an adult, heat 1 cup of water to 100 degrees Fahrenheit. Pour it into the Hot bowl, being careful not to burn yourself.
9. Heat 1 cup of water to 70 degrees Fahrenheit, and pour it into the Warm bowl.
10.Fill the Cold bowl with water that's 40 degrees Fahrenheit.
11. Immediately place all three bowls in the freezer.
12. Record the starting temperatures in the correct columns of your notebook.
13. Open the freezer door every 10 minutes and take the temperature of the water in each bowl with a thermometer. Record the temperature in your notebook.
14. Repeat Step 13 until all three bowls have frozen over.
15. Compare the information in each of the three columns in your notebook. Was your hypothesis correct?
RESULTS/DATA: (claim/answer)The bowls that contain the hot and warm water will freezer faster than the bowl that is filled with cold water. (Evidence) all water evaporates, which means that the liquid (water) "disappears" and becomes a vapor, or gas. (the transfer of heat within the water as it moves around) plays a part in helping hot water freeze more quickly than the bowl of cold water. The hot water has more convection currents than cold water, causing it to cool down much more quickly.
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