Question of the Day

1
Question of the Day

• What causes a candle flame to go out when it is
  confined for a short time (EX a jar is put on
  top)?

2
Revisit

• The burning process consumes a gaseous material
  present in air and when it is gone the burning
  ceases.
• The burning process produces a gaseous material
  which somehow quenches (or suffocates) the
  flame.