Materials List: A Matter of Leaching

Each group needs:

To share with the entire class:

  • sand (approximately 5-10 pounds)
  • gravel (approximately 5-10 pounds)
  • cotton balls
  • screening (one to two 4"x4" squares per group)
  • activated charcoal or carbon (optional, can be purchased on or at some garden centers)
  • garden soil, not potting soil (one handful per group)
  • permanent marker