A stream table is a tool used to show how water causes erosion. Water from the left side of the table is added to model a stream.Suppose a block of wood is placed under the left edge of the table.Which characteristic of the stream is changed?

Placing a block under the left edge tilts the stream table, changing the slope from one end to the other. The slope of a stream is its gradient, so the characteristic changed is the gradient. It does not directly change the amount of water or sediment in the stream.

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