Question

geologists know that the most influential force in erosion is water. they often study streams to see how materials are moved from one place to another. a local geologist was interested in studying the erosion in the loxahatchee river and recorded what she observed in a notebook. how is the geologists work different from the stream table experiment? the geologist had no formal plan to study the river. the geologist observed the river and did not test variables. the geologist did not observe the river for long enough to collect data. the geologist did not collect valid data because the conditions at the river were not controlled.

Explanation:

In a stream - table experiment, variables are tested. The geologist just observed the river without testing variables.

Answer:

The geologist observed the river and did not test variables.