The Water Cycle

Today, students simulated the water cycle by acting as water droplets that traveled through the different forms and locations water is found in on earth! We learned that at its simplest, the water cycle can be summarized as:

  1. Water vapor in the atmosphere condenses into clouds
  2. Water particles in the clouds grow bigger, and fall to the earth as rain
  3. Rainwater lands in either the ocean, rivers, and lakes, or on the ground
    • From the ocean, rivers, and lakes, water evaporates and re-enters the atmosphere
    • On the ground, water infiltrates the earth and joins the groundwater, which eventually flows to the ocean

But during our activity, we discovered that the real water cycle is more complicated. Water can go through mini-cycles back and forth, traveling, for instance, from the atmosphere to the ocean and back to the atmosphere.  Most students completed one, two, or even more complete cycles! Water can also become trapped for many years in the ocean, groundwater, or glaciers. It turns out that almost all (more than 96%) of the earth’s water is stored in the oceans; the water we use for drinking and watering crops mostly comes from the tiny fraction that is stored as fresh water in rivers and lakes!  In addition we learned how the earth is a closed system meaning water can never escape into space but it simply change forms and locations among the following: snow, glaciers, oceans, aquifers, the ground, the atmosphere, rivers & lakes, plants, and the clouds.  Students also discovered what the main driving force is behind the water cycle, that being evaporation.  However, even more important is the sun which provides the energy required for evaporation to occur.  In the end, students had a fun time turning the classroom into planet earth and traveling from one form of water to another! 

El ciclo del agua

El día de hoy, los estudiantes se convirtieron en “el agua” del “ciclo del agua” de la Tierra. Durante la clase aprendimos que el ciclo del agua puede ser resumido de la siguiente manera:

  1. El vapor de agua en la atmósfera se condensa en nubes
  2. Las partículas de agua en las nubes, aumentan de tamaño y luego caen a la Tierra en forma de lluvia
  3. El agua lluvia “aterriza” en el océanos, los ríos y lagos o en el suelo
  1. Desde el océano, los ríos y lagos; el agua se evapora y vuelve a ingresar a la atmósfera.
  2. En el suelo, el agua se infiltra en la tierra, se une a las aguas subterráneas, las cuales eventualmente fluyen hacia el océano

Durante nuestra actividad descubrimos que en realidad el ciclo del agua es más complejo. El agua puede viajar de ida y de vuelta, en “mini ciclos, como por ejemplo, cuando viaja de la atmósfera al océano y luego de vuelta a la atmósfera. El agua también puede quedarse “atrapada” por muchos años en el océano, en las aguas subterráneas o en los glaciares. De hecho, la mayoría del agua del planeta (más del 96%) está almacenada en los océanos. El agua que tomamos o que usamos para regar los cultivos proviene, en su mayoría, de los lagos y ríos de agua dulce, la cual es una pequeña fracción del agua del planeta.

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1 Comment:

  • avatar

    Our students had such a wonderful time simulating and learning about the Water Cycle! The interactive nature of the lesson helped them to further develop foundational skills about our planet and have fun while doing so. Thank you Scientists!

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