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Water Cycle Science Fair Project Ideas

Instructor: Kerry Gray

Kerry has been a teacher and an administrator for more than twenty years. She has a Master of Education degree.

The water cycle describes the movement of water through the Earth's surface and atmosphere through evaporation, condensation, precipitation, and collection in bodies of water. This asset offers ideas for science fair projects about the water cycle.

Water Cycle

The Earth has an amazing ability to recycle its own resources. The water cycle is a perfect example of this phenomenon. Students discover how water evaporates and turns into clouds before the water vapor condenses and turns into precipitation. Once the water falls from the clouds as rain, sleet, hail, or snow, it collects in oceans, lakes, streams, and as groundwater before the process starts all over again. The following science fair projects provide upper elementary students ideas for experiments that allow them to interact with the water cycle in meaningful ways that teach them how the water cycle purifies the water, how the collection phase of the cycle affects evaporation, and how the weather impacts evaporation.

Key Terms:

  • condensation
  • evaporation
  • water vapor
  • precipitation

Saltwater Evaporation

This experiment explores how water is purified through the water cycle.

Materials:

  • salt
  • water
  • commercial saline solution
  • black construction paper
  • trash bag
  • construction paper
  • markers

Research Topics & Guiding Questions:

  • Why isn't rain salty?
  • What happens to the salt when saltwater evaporates?

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