Activity A: Get the Gizmo ready
. Click Reset ( 2 ) and select Macro view.
Set the Water temperature to 10 °C
• Set the Ice volume to 0 cm
Phase changes
Question: How is temperature related to phase changes ?
1. Predict Based on your prior knowledge, predict the following:
I
A At what temperature will water change from a liquid to a solid (freeze)?
B. At what temperature will water change from a solid to a liquid (melt)?
C. At what temperature will water change from a liquid to a gas (boil?
2. Investigate Use the Gizmo to explore phase changes. Use the Add/remove heat energy slider to control
the water temperature Record your observations in your notes, then answer the questions below
A At what temperature does water freeze?
This is the freezing point
B. At what temperature does ice melt?
This is the melting point
C At what temperature does water boil?
This is the boiling point
3. Observe Set up the Gizmo to observe freezing. What do you notice about the temperature while the water
is in the process of freezing?
4. Explore Use the Gizmo to investigate melting and boiling Does the temperature change while either of
these phase changes is occurring?
5. Interpret Select the GRAPH tab to see a graph of temperature vs time. Click the button until the whole
graph is visible. What does the graph look like duning a phase change?