Each group needs:

• Student Worksheet
• spray bottle

To share with the entire class:

• glass or beaker of water (preferably one with a large surface area on the bottom)
• triple beam balance or electronic scale
• various material for construction:
• tape
• paper (either copy or construction)
• plastic wrap
• aluminum foil
• test tubes
• petri dishes
• paper towels
• sponges
• stop watches or timers to measure evaporation time