PURPOSE: TO GAIN A BASIC UNDERSTANDING OF A "CLOSED SYSTEM."
GOAL: UPON COMPLETION OF THIS INVESTIGATION, THE STUDENT WILL BE ABLE TO EXPRESS VERBALLY AND IN WRITING WHAT IS MEANT BY A "CLOSED SYSTEM."
MATERIALS: BALLOON - FLASK - HEAT SOURCE - BALANCE - TONGS
PROCEDURE:
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1. PLACE THE BALLOON OVER THE MOUTH OF THE FLASK AND MASS THE SET-UP.
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2. PLACE SET-UP OVER/ON HEAT SOURCE AND START THE HEATING PROCESS.
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3. SEVERAL TIMES DURING THE HEATING PROCESS, MASS THE SET-UP. (USE YOUR TONGS AS SET-UP WILL BE HOT)
OBSERVATIONS:
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1. NO APPRECIABLE CHANGE IN MASS WAS NOTICED AS THE VOLUME INCREASED.
NOTE: BUOYANCY PREVENTS THIS FROM BEING A TRUE EXAMPLE OF A "CLOSED SYSTEM" BUT, THE STUDENT WILL STILL UNDERSTAND THAT NOTHING ENTERS OR LEAVES THE CLOSED SYSTEM.
EVALUATION:
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1. THE STUDENT CAN DEFINE WHAT IS MEANT BY A "CLOSED SYSTEM" BOTH ORALLY AND IN WRITING.
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2. THE STUDENT CAN RELATE THIS INVESTIGATION TO THE EARTH'S "CLOSED SYSTEM."