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Laboratory work №4: “External factors affecting the transpiration process”

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Information about work

In this work, students consider the mechanism of the transpiration process in plants. They will study the effect of external factors on transpiration and will learn to do by themselves a potometer (transpirometer) – a device for measuring the speed of transpiration.

Necessary materials:

  • a plant material
  • water
  • petroleum jelly
  • plastic bottle (2 litre)
  • plastic bottle (500 ml)
  • beaker 
  • transparent rubber tube (50 cm)
  • cotton thread
  • thick cardboard (25 cm х 6 cm) - 2 pcs.
  • scale template
  • transparent tape
  • insulation tape
  • scissors
  • paper cutter
  • pipette
  • sketch pen
  • safety pin

Course Content