Conditions for Evaporation – How can Water be Evaporated Faster or Slower

Transcript

When do Clothes dry Faster ? Cold Day (Summers ) (Winters ) There is more heat of Sun There is less heat of Sun So Water evaporates Faster So Water evaporates Slower teachoo When will we feel more Sweat ? Windy Day ↓ There is more movement of Wind So Water evaporates Faster Humid Day ↓ There is less movement of Wind So Water evaporates Slower So we will feel less sweaty So we will feel more sweaty Note teachoo Evaporation Depends upon Surface Area also teachoo Activity 8.8 Part 1 Water in Bottle Cap ↓ Exposed area of water Time taken for complete evaporation Less (bottle cap) More (plate) Water in Plate It has More Surface Area So it has More Area exposed to Air So it dries Faster Water in Sunlight Sunlight provides more heat energy So it will evaporate faster Slow Evaporation Water kept Outside on Windy Day Water Evaporates Faster due to More Air Speed Activity 8.8 Part 2 Water kept Outside on Rainy Day There is More Humidity (More Water in Air ) So Water Evaporates Slower Heating of Water This Evaporates Fastest Heating of Oil This Evaporates Slowest Do only Water Evaporates ? teachoo Summary Factors Influencing Evaporation :- Heat More Heat More Evaporation Less Heat Less Evaporation Wind Speed More Wind Speed More Evaporation Less Wind Speed Less Evaporation Humidity More Humidity Less Evaporation Less Humidity More Evaporation Substance Water Quickly Evaporates Oil Slowly Evaporates