This activity explores how nanotechnology can be used to change the properties of a surface so that it either attracts or repels water.  It is appropriate for middle school and high school students.

• Teachers Guide  to "The Water Race: Hydrophillic/hydrophoic surfaces"    [NNIN1040]
  
• Student Worksheet to "The Water Race: Hydrophillic/hydrophoic surfaces"  [NNIN1041]