1. Guiding Questions 1On the Celsius scale, at what temperature does: awater boil? bice melt? cwater freeze? 2Does water melt and freeze at the same temperature? 5.5B

2. Task 1 Imagine you are asked to make and carry out a simple plan to melt the ice cube. Use your knowledge of inquiry and the scientific method to explain your plan.

3. Task 2 Look at this picture. The temperature probe in Figure 1 reads 8 o C. Is the temperature of the water in the beaker closer to the freezing point or the boiling point? ________________ Is all the water in the beaker pictured frozen? ________ What is the temperature change needed for all the water to freeze into a solid? Describe it. What has to happen to the temperature of ice if you want it to melt? Describe it. Does water melt and freeze at the same temperature? Explain. 8 0 C 5.5B

4. Task 3: Boiling Water Look at this picture. The thermometer in Figure 2 reads 100 o C. At what temperature does water boil? Describe it. What is the temperature scale used in the thermometer? 5.5B

5. TASK 4: Web Investigation Instructions: Visit www.sciencekids.co.nz/gamesactivities/statema terials.html to test out changes in water when you add or remove heat. Follow the instructions provided on the webpage. Record your observations for each step in your journal. www.sciencekids.co.nz/gamesactivities/statema terials.html 5.5B

6. Task 5: Self-Assessment (record the following in your journal) Use complete sentences – Question 1 The water in the beaker has reached its freezing point. Therefore, the thermometer is recording __________. A.42 o F B.32 o C C.0 o C D.100 o F 5.5B

7. Assessment – Question 2 The large bucket in the picture above shows ice and water. Explain what is happening. Include a discussion of the temperature in Celsius inside the bucket and a possible temperature outside of the bucket to cause the ice and water to be shown together. 5.5B

8. Assessment – Question 3 Let’s suppose that all the temperature probes in class are not working. So, you have to use a thermometer. Your teacher has asked you to read the thermometer in a beaker with water. Draw a picture of water with a thermometer properly held with a clamp in the beaker. Indicate where your eyes should be to read the thermometer correctly. Explain your thinking with both writing and diagrams. 5.5B