Page 20 - Demo

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THERMODYNAMICS
Heat Transfer Kit
Students fill one insulated container with hot water and the other with cold water. Then they link the two containers with an aluminum heat transfer bar. Students record the temperature change of the water in the cups over time and relate the change to the associated heat transfer. Purchase one for use as a class demonstration or one for each laboratory group.
Radiometer
1,000+
products for
middle school physical science
at flinnsci.com
Conduction, Convection and Radiation—Activity-Stations Kit
Discover the basic principles of heat transfer with four hands-on experiments:
• Test the thermal conductivity of different materials, and compare results with known quantities.
• Investigate how temperature affects the density of a liquid, and watch as convec- tion currents are created.
• Observe the dramatic effects of convec- tion currents in air on a lighted candle.
• Explore heat transfer through radiation by measuring the temperature increases for two types of sand exposed to a heat source.
AP7183 I $73.20
AP4536 I $25.40
One of the all-time classic solar engines, the Radiometer demonstrates the effect of infra- red radiation with the spinning of its vanes. Just set it in bright light or the sun, and away it goes. The hows and whys of solar motion are discussed in the accompanying literature.
AP1948 I $15.50
Ice Melting Blocks
18
AP6488 I $25.75 FLINN SCIENTIFIC I
MIDDLE SCHOOL PHYSICAL SCIENCE
Touch the identical-looking blocks. One feels cold to the touch, the other feels warm. Which block melts the ice faster—cold or warm? The result is unexpected! The cold block melts the ice cube remarkably faster than the warm block. How is this possible? The cold block
is a heat conductor. The warm block is an insulator. An unmistakable discrepant event that
is sure to clarify the difference between a heat conductor and a heat insulator. Instructions provided. 10 x 10 cm.