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Gizmos Student Exploration: Phases of Water
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Name: Date:Student Exploration: Phases of Water
Vocabulary: boil, condense, density, freeze, gas, liquid, melt, molecule, phase, solid, volume
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
1. A pot filled with snow is left on a hot stove for a while. What would happen?
first the snow will melt into water. Then the water will heat up and eventually boil.
2. A phase is a state of matter, such as a solid, a liquid, or a gas. Which phases would you see?
Explain. Solid ice, liquid water, and water vapor.
3. A phase change is a change from one phase to another. What phase changes would you seein
this example? Melting and boiling, condensation.
Gizmo Warm-up
In the Phases of Water Gizmo, you can heat up or cool down a
beaker of water.
1. Press Heat to heat up the water. Wait until the temperature
stops rising and observe. What happens?
The water heats up. After a while, bubbles are seen in the water
and the lid starts to lift up
2. Why do you think the lid lifts up? The lid lifts up because of the water vapor that is produced
3. Now press Chill to remove thermal energy from the water. What happens now? The water
cools down and freezes into ice.
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, Activity A: Get the Gizmo ready:
• If necessary, press Chill and wait until
Phases of water the temperature is -20 °C.
Question: How does temperature affect the phase of water?
1. Observe: In the Gizmo, solid ice is gray, liquid water is blue, and water vapor gas is light blue.
Heat or Chill the water as needed to reach the temperatures below.
A. What phase is the water in at -20 °C? (Circle one): solid liquid gas
B. What phase is the water in at 30 °C? (Circle one): solid liquid gas
C. What phase is the water in at 105 °C? (Circle one): solid liquid gas
2. Hypothesis: How does the temperature affect the phase of water?
3. Students should note that as temperatures rise, solids turn into liquids, and liquids turn into
gases
4. Predict: Predict the phase of water at the six temperatures given below. List your predictions in
the Predicted phase row of the table. Then fill in the Actual phase row using the Gizmo.
Temperature -10 10 50 90 110 120
°C °C °C °C °C °C
Predicted phase
s l l l g g
(solid, liquid, or
gas)
Actual phase
s l l l g g
(solid, liquid, or
gas)
5. Analyze: While testing your predictions, you may have noticed that there were specific
temperatures at which the phase of the water always changed.
A. At what temperature does water melt (change from solid to liquid)? _0
B. At what temperature does water boil (change from liquid to gas)? 100_
C. At what temperature does water condense (change from gas to liquid)? 100
D. At what temperature does water freeze (change from liquid to solid)?
This study source was downloaded by 100000820363976 from CourseHero.com on 05-04-2022 03:15:43 GM2T0-109
5:00
https://www.coursehero.com/file/76237886/Phases-of-Water-Gizmodocx/
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