Class-8 (Science) chapter
•combustion-is the process of burning of a substance in the presence of oxygen to give off heat and light.
•Combustible substance-are substance like lpg. Petrol. Charcoal. Paper. Wood. Which burn in air easily.
•non combustible Substance-are substance like water. Glass. Cement. And soil which do not burn in air.
Flame-is the gaseous light emitting part of fire.
•Candle yellow light are temperature called flame.