Materials List: Just Breathe Green:
Measuring Transpiration Rates

Each group needs:

  • 2 plants of different native plant species, in 4-inch or 1-gallon containers; usually ~$2.50 for a plant in a 4-inch pot and ~$7 for a plant in a 1-gallon pot
  • (2) 2-liter or 20-ounce plastic bottles, for 1-gallon and 4-inch plants respectively, or (4) produce baggies
  • (if using produce baggies) 4 twist ties
  • black permanent marker, such as a Sharpie┬«
  • scale, accurate to 0.1 gram, such as a triple beam balance or laboratory scale
  • 2 stopwatches or timers
  • gallon jug half filled with water
  • calculators
  • pencils, colored pencils or markers, ruler (for graphing)
  • Just Breathe Green Worksheet, one per student

For the entire class to share:

  • scissors, for teacher to cut plastic bottles
  • liquid food coloring, for teacher to prepare colored water, 10 drops per group