Why do sparklers spark?
Show answer & explanation
Answer: Metal particles burn brightly
Metal particles burn brightly ✓ — Correct! Sparkler wire coated with mixture: metal powders (iron, aluminum, magnesium), oxidizer (potassium nitrate), binder. Light tip—heat starts reaction. Metal particles burn in oxygen, heating to ~1000-1600°C—glow white/orange (blackbody radiation). Burning particles fly off (sparks)—momentum from gas expansion. Different metals = different colors. Iron makes orange, titanium makes white, copper makes blue. Oxidizer provides oxygen for combustion!
Chemicals react with oxygen — Wrong. Oxidizers provide oxygen for reaction, but sparkle comes from burning metal particles glowing white-hot and flying off.
Electricity flows through wire — Wrong. No electricity. Sparklers are chemical combustion—metal particles burning in oxygen from chemical oxidizer, creating heat/light.