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air pressure aluminum arette atoms balloon bell wire Bernoulli effect Bernoulli's principle blow boiling boric acid bowl bubbles bulb burn calcium carbide candle flame carbon dioxide cardboard cell clamp coil coin colors Connect copper cord Demonstrate dime disc drop dry ice electric EXPERIMENT film fingers flashlight force freezing funnel galvanometer glass heat Hold hole hose hydrogen peroxide ice cube inches inside insulated wire lamp lens lift lighter lower drawing magnet marbles match melted metal milk bottle mirror molecules momentum move nail NEEDED needle oatmeal box oxygen paper piece ping-pong ball pipe Place potassium permanganate produces pull push REASON reflected refracted rubber salt screwdriver shown side silicate soda straw sodium silicate spinning spool steel wool stick stove string sulfate sun battery surface temperature thermometers TIN CAN TELEPHONE transformer tube turn upper drawing vibrations vinegar weight yo-yo zinc