FACTORS

• WHAT IS TRANSPIRATION?

  loss of water vapour from stomata by evaporation
• WHAT ARE THE FACTORS AFFECTING TRANSPIRATION RATE?

  light intensity, temperature, humidity, wind
• HOW DOES LIGHT AFFECT TRANSPIRATION RATE?

  positive correlation
• HOW DOES TEMPERATURE AFFECT TRANSPIRATION RATE?

  positive correlation
• HOW DOES HUMIDITY AFFECT TRANSPIRATION RATE?

  negative correlation
• HOW DOES WIND AFFECT TRANSPIRATION RATE?

  positive correlation
• POSITIVE CORRELATION OF LIGHT AND TRANSPIRATION RATE?

  more light = more stomata open = larger SA for evaporation
• POSITIVE CORRELATION OF TEMPERATURE AND TRANSPIRATION RATE?

  more heat = more KE = faster moving molecules = more evaporation
• NEGATIVE CORRELATION OF HUMIDITY AND TRANSPIRATION RATE?

  more water vapour in air = higher water potential outside leaf = reduces water potential gradient
• POSITIVE CORRELATION OF WIND AND TRANSPIRATION RATE?

  more wind = blows away humid air with water vapour = maintains water potential gradient