Critical Thinking
List three potential harmful effects that could have occurred after the dirt road in the accompanying figure was built in the area.
What will be an ideal response?
Increased erosion; increased sediment runoff into waterways; habitat fragmentation; biodiversity loss; exposure of forest to nonnative pests, diseases, and wildlife species.
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Stabilizing banks is an important component of stream restoration. Which of the following is NOT a method of bank stabilization?
A. Supporting with tree trunks B. Supporting with rock walls C. Adding soil so that the slope is at least 45 degrees D. Using mulch E. Using rocks
After three half-lives, one-ninth of an original radioactive parent isotope remains, and eight-ninths has decayed into the daughter isotope
Indicate whether the statement is true or false
The direct collision of a raindrop with the ground, laterally shifting fine particles a few millimeters, is ______.
a - splash erosion b - valley cutting c - rill formation d - peds pushing e - plucking
An astronaut on another planet drops a 1-kg rock from rest. The astronaut notices that the rock falls 2 m straight down in 1 s. On this planet, how much does the rock weigh?
A) 1 N B) 4 N C) 5 N D) more than 5 N