This Science quiz is called 'Rivers' and it has been written by teachers to help you if you are studying the subject at elementary school. Playing educational quizzes is an enjoyable way to learn if you are in the 3rd, 4th or 5th grade - aged 8 to 11.
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Rivers are natural streams of water. They are formed by the movement of water from high ground to lower ground and then usually to the sea. The place where a river begins is called its source. Rivers are constantly changing as they flow over lands and have many different features. They can change shape as they erode the ground at their banks. When rivers eventually meet the sea they may form 'D' shaped masses of channels called deltas.. Small rivers are also called streams, creeks and brooks.