Azalia Flores
ELED 415
Inst. H.B. Barrett, Ed.D.
11/06/07
Paradox Proposal
Science Area: Meteorology
Concept: Understanding the difference between heat and temperature.
Paradox: Adding heat to a material does not necessarily raise its temperature.
Objectives:
Understand phase change.
Observe how the temperature of ice/water responds to added heat.
Observe that ice absorbs heat as it melts without changing temperature.
Procedure:
1. Put 200 mL of water in a Pyrex beaker and add crushed ice.
2. Heat the water on the hot plate.
3. Start recording the temperature every 30 seconds.
4. Keep recording until the ice has melted.
5. Record when the ice melts.
6. Keep recording three minutes after the ice melted
Analysis:
Graph temperature as function of time. Then draw a vertical line dividing the graph in two
regions--one before the ice melts and the other one after the ice melts. Why is the slope different
in the two regions? Where does heat go in the first region? And where does heat go in the second
region--from the portion of the time when there was ice in the water and there was no ice?
Activity (include sketch):
