Have you ever looked closely at the flame? Which part of ... In this activity you will light some candles to find out—no special occasion required! Background Whether they are on a birthday ...

Be sure no liquid comes out – just the gas. Carbon dioxide molecules are heavier than air. Because of this, they push the oxygen and other molecules in the air out of the way as they sink down over ...

Do this activity to find out—and put out a candle as if by magic! Background What actually ... Make sure, however, that no liquid or foam reaches the flame. What happens when you add the vinegar ...

The researchers lit a candle in a controlled environment, with no air movement or any other external signals—Faraday's quiet flame. Then they played sounds from a speaker and used a high-speed ...