If fire burns because of oxygen, how come candles don’t lit up when we blow on them, but instead they go out?

Question

If fire burns because of oxygen, how come candles don’t lit up when we blow on them, but instead they go out?

In: Chemistry

Answer 1

Because you don’t exhale pure oxygen, you exhale air filled with carbon dioxide.

The carbon dioxide surrounds the flame blocking the oxygen in the air causing the flame to die.