Page 21 - Demo

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THERMODYNAMICS, CONTINUED
Collapsing Can—Demonstration Kit
Here’s a forceful demonstration—over 1,800 lbs of force! This demonstration will convince students that air exerts significant pressure. Simply place about a centimeter of water in the bottom of the can and heat it until it boils and steam comes out of the uncapped top. Remove the can from the heat, cap it tightly and watch and listen to the drama. As the can cools, a vacuum forms inside and the can dramatically collapses. A real attention-getter. Includes one can and detailed instructions.
AP4695 I $12.65
Ball and Ring Apparatus
Perform the classic “thermal expansion of metal” demonstration with this ball and ring apparatus. Brass ball passes freely through ring at room temperature, but when the ball is heated in a flame, it no longer passes through the ring. Nonconductive handle provides excellent thermal insulation and keeps hands cool.
AP9031 I $16.35
Exothermic & Endothermic Reactions—An Energy Changes Laboratory Kit
In this lab activity, students perform three separate reactions regarding both the neutralization and dissolving of salts. With each set of reactants, students measure the significant temperature changes that occur in each calorimeter and then determine the amount of heat released or absorbed by the reaction. Students classify each reaction as exothermic or endothermic and write the chemical equation. Complete for 30 students working in pairs.
AP6128 I $46.40
Up, Up and Away—Hot Air Balloon Student Activity Kit
Fill the sky with colorful hot air balloons! Each student group will construct and launch their own giant hot air balloon. Students will learn how hot air balloons
lift from the ground, stay afloat and eventually descend. Includes easy-to-follow instructions and all the materials needed to construct fifteen 3' x 2' hot air balloons.
AP6310 I $72.40
FLINN SCIENTIFIC I MIDDLE SCHOOL PHYSICAL SCIENCE 19