Materials List: Dripping Wet or Dry as a Bone?

Each group needs:

  • 1 dry sponge
  • 1 plate, plastic or aluminum
  • 1 plastic spoon
  • a┬ácup
  • water, 1 cup
  • paper and pencil, to keep a tally
  • Sponge Saturation Worksheet, one per student
  • Relative Humidity Graph, as a handout for each group or each student, or as an overhead projector transparency to show the class
  • (optional, if students are graphing data) graph paper, one sheet per student

For the entire class to share:

  • the day's humidity, such as from the newspaper weather page, television or radio weather broadcast, or Internet weather website