I m Melting! Water Changes States
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1 I m Melting! Water Changes States Computer 14 As you probably know, if you put ice in a drink, it cools the drink down. At the same time that the ice is cooling down the drink, it is being melted by the liquid it is in. Do you think that if you put an ice cube in hot water, it will melt at a different rate than if you put it in colder water? During this activity, you will investigate how ice melts in water. OBJECTIVES In this activity, you will Observe the melting of ice cubes over a period of time. Learn about the properties of solid water and liquid water. MATERIALS computer with Logger Lite software installed Go!Temp probe 2 cups ice room- water PROCEDURE 1. Write a hypothesis about what will happen to the ice and the of the water when you put an ice cube in room water. Hypothesis: Evaluation copy If I put an ice cube in water, it will and the of the water will Elementary Science with Vernier 14-1
2 Computer Make sure the Go!Temp probe is connected to the computer. 3. Start Logger Lite on your computer. 4. Open the file for this activity by doing the following: a. Click the Open button,. b. Open the folder called Elementary Science. c. Open the file called 14 I m Melting. 5. Fill one of your cups about half full with room- water provided by your teacher and place it in front of you on the table. 6. Put two whole ice cubes in your other cup. 7. Place the probe in the water. Make sure it won t tip the cup over. 8. You will now collect data and make observations about the melting ice and the of the water. You may want have one person be in charge of adding ice cubes and another to write down your observations. Someone should also be responsible for stirring the water with the probe for the entire time that data are being collected. a. When everything is ready, start collecting data by clicking the Collect button,. b. Add one ice cube to the water. Gently stir the water with the probe. c. Watch the on the computer screen. In the space provided on the Observations Sheet, write a few observations about the ice cube and the of the water. An example has been started for you. d. When the ice cube has melted completely, immediately add another ice cube, and continue stirring with the probe. Write down your observations. e. When the second ice cube has melted completely, click the Stop button,. 9. Dispose of your materials as directed by your teacher Elementary Science with Vernier
3 I m Melting! Water Changes States Observations Sheet When I put the first ice cube in the water, it. The of the water. Elementary Science with Vernier 14-3
4 Computer 14 ANALYZE YOUR DATA 1. Was your hypothesis correct? Why or why not? 2. What was the water when you put in the first ice cube? Record this value in the Data Table as the Starting for ice cube number 1. Remember, you can click the Examine button,, to find exact values of the data points. 3. What was the of the water when the first ice cube had melted completely? Record this value in the Data Table as the Ending for ice cube number Record the values of the starting and ending s for ice cube number Subtract the starting and ending s for the two ice cubes to find out how much the decreased while each ice cube melted. Write your answers in the last column of the Data Table. Data Table Ice cube Starting Ending Change in number 1 C C C 2 C C C 6. Look at the graph that was made during data collection. Which ice cube melted the fastest? 7. Why did it take longer for one of the ice cubes to melt? Good job!! 14-4 Elementary Science with Vernier
5 Vernier Lab Safety Instructions Disclaimer THIS IS AN EVALUATION COPY OF THE VERNIER STUDENT LAB. This copy does not include: Safety information Essential instructor background information Directions for preparing solutions Important tips for successfully doing these labs The complete Elementary Science with Vernier lab manual includes 43 labs and essential teacher information. The full lab book is available for purchase at: Vernier Software & Technology S.W. Millikan Way Beaverton, OR Toll Free (888) (503) FAX (503)
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