Today students investigated the effects of rocks tumbling in a river. From the results of their investigation, they constructed an explanation for why there is sand at a beach. Students were then given an important vocabulary word to help with their explanation -- erosion. Changes to the earth’s surface can happen slowly through the process of erosion.
Last week we explored how rivers flow from high points of the earth’s surface to low points and into the ocean. Oceans are usually next to sandy beaches - but how did all of that sand get there? As the rivers flow toward the ocean, rocks collide into one another causing them to break into smaller pieces. By the time those rocks reach the end of the river, they are tiny rocks - or sand! Today students investigated the effects of rocks tumbling in a river. From the results of their investigation, they constructed an explanation for why there is sand at a beach. Students were then given an important vocabulary word to help with their explanation -- erosion. Changes to the earth’s surface can happen slowly through the process of erosion.
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