River deltas are formed through the process of sediment deposition as a river flows into a larger body of water, such as an ocean or a lake. As the river's velocity decreases upon entering still water, the sediment it carries—composed of sand, silt, and clay—begins to settle out, accumulating over time. This accumulation creates a landform that can branch out into several distributary channels, further altering the landscape. Over time, the continuous deposition of sediments can lead to the growth and expansion of the delta, fostering diverse ecosystems and habitats.
Question
In 3 to 5 sentences, explain the processes that form river deltas. (4 points)
Short Answer Rubric (4 points)
Points Awarded Criteria
4
The answer is very clear.
The answer is fully supported by details.
There may be a few errors in grammar, usage, or mechanics. Errors do not interfere with meaning.
3
The answer is mostly clear.
The answer is supported by mostly relevant details.
There are a few errors in grammar, usage, or mechanics. Errors do not interfere with meaning.
2
The answer is somewhat clear.
Details are weak or not related.
There are some errors in grammar, usage, and mechanics. Errors interfere with meaning.
1
The answer is not clear.
There are few or no supporting details.
There are many errors in grammar, usage, and mechanics. Errors interfere with meaning.
0 The question is not answered.
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