#1 - WARM AIR CURRENTS - This experiment shows how warm air currents rise and circulate in the air. Cut a piece of cardstock or heavy paper into a triangle shape a little larger than the mouth of a coffee cup. Attach it to the cup with clay. Tape a straight pin to the tip of the triangle. Cut a strip of paper and fold it into an L shape to make a propeller. Pour very warm water into the cup. Gently place the propeller on top of the pin. Watch how the warm air currents make the propeller spin...
#2 - SOUND VIBRATIONS - Cover the top of a bowl very tightly with plastic wrap. Place several pieces of uncooked rice on top. Place the bowl near a speaker. Turn on some favorite music and watch the rice dance. Start out at low volume and gradually increase to see how the volume affects the movement...
