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Build a TerrAqua Investigation Column (option 2)

Option 2


  • One 2-liter soda bottle
  • One bottle cap
  • Tool Box
  • Wicking material-fabric interfacing or cotton string
  • Water, soil and plants
Step 1Remove label from the 2-liter bottle. On bottle #1, cut 2 cm below shoulder to produce component "A," a shallow funnel top and "C" a deep reservoir.

Step 2 – Poke or drill a 1 cm hole in bottle cap.

Step 3 – Cut Bottle #2, 1 cm below hip to produce component "B" a deep funnel unit with hip taper.

Step 4 – Fill reservoir with water. Add soil and plants to top chamber. To be effective, the wick should run up into soil, not be plastered along a side of the bottle. For better drainage, place a layer of gravel, sand or vermiculite in the bottom of the soil unit.
Hang Hang this bottle
National Science Foundation   Bottle Biology, an instructional materials development program, was funded by a grant from the National Science Foundation administered by the University of Wisconsin-Madison.   Wisconsin Fast Plants