Water Cycle in a Bag

Explore polymer science with this classic science experiment

Materials

• Clear sandwich bag

• Sharpie

• Blue food coloring

• Water

Directions

• Use a black Sharpie to draw a sun, cloud and water on the sandwich bag.

• Fill a small measuring cup with 1/4 cup of water. Add four couple of drops of blue food coloring.

• Pour blue water into the sandwich bag. Seal bag tightly.

• Tap the bag to a window and watch it work

What’s Happening

Your munchkins will witness a mini version of the Earth’s water cycle. Warmed by the sunlight, the water will evaporate into vapor. As the vapor cools, it will change back into liquid (condensation). When enough water condenses, it falls down in the form of precipitation.

adapted from Playdough to Plato