Fires in rural houses are often extinguished with water; in laboratories, alcohol lamps are extinguished by covering them with lamp caps. These two fire extinguishing methods are based on the princip

Fires in rural houses are often extinguished with water; in laboratories, alcohol lamps are extinguished by covering them with lamp caps. These two fire extinguishing methods are based on the principles of ______,

Water is often used to extinguish fires in rural houses because water can absorb a large amount of heat when it evaporates, thereby lowering the temperature and achieving the purpose of extinguishing the fire. To extinguish the alcohol lamp in the laboratory, cover it with a lamp cap because covering the lamp cap can isolate the alcohol from oxygen and achieve the purpose of extinguishing the fire.

So fill in: lower the temperature to below the ignition point; isolate the air.