Earth Science Unit StudyWeek 20: We did an experiment to show how rivers flow when it doesn't rain.
Water always flows down hill. On it's way to the ocean water may flow over a water fall, through a canyon, or into a delta. When it rains, much water seeps into the ground where it is stored. If the ground is saturated, after the rain, some water continues to trickle out of the ground and flow into streams. If the ground can hold the water, additional water is not released. That's why sometimes rivers dry up during periods with no rain, but other rivers continue to flow.
We have been using the book Rocks, rivers & the changing earth,: A first book about geology as a reference. It is a chapter book, written in story format, and packed with experiments that have to do with Earth Science. In addition, the book Geography from A to Z: A Picture Glossary (Trophy Picture Books) gives simple definitions of different land and water forms. By repeating this simple experiment waterfall, river, delta, lake and island among others were visible.
Here it formed a river.
After adding more water a lake was formed at the base of the river.
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