Reaction of magnesium with carbon dioxide
The reaction of magnesium with carbon dioxide (dry ice) is demonstrated. Despite the absence of air, the magnesium continues to glow.
combustion
Exploding soap bubbles filled with hydrogen alone
Hydrogen-filled soap bubbles are ignited producing small explosions.
Exploding soap bubbles filled with hydrogen plus some oxygen
Hydrogen plus some oxygen produces louder explosions.
Exploding soap bubbles filled with hydrogen plus more oxygen
Hydrogen plus more oxygen produces even louder explosions.