AnswersPARTA - EVP PGCPS BIOGEOCHEM CR FALL2026 - 798113Lab: Environmental Changes in a Watershed

Lab: Environmental Changes in a Watershed Answers

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3

Which statements are true about point and nonpoint source pollution?Human activity causes point and nonpoint source pollution.Only nonpoint source pollution affects abiotic factors in a watershed.Point source pollution affects only the part of the lake or river near it.Both point and nonpoint source pollution affect biotic factors in a watershed.Point pollution flows through the bodies of water in a watershed but not through its land.

A
Human activity causes point and nonpoint source pollution.
B
Only nonpoint source pollution affects abiotic factors in a watershed.
C
Point source pollution affects only the part of the lake or river near it.
D
Both point and nonpoint source pollution affect biotic factors in a watershed.
E
Point pollution flows through the bodies of water in a watershed but not through its land.
6

During the summer, when the land is brown and the grass is green, the population of mice decreases because mice are easily spotted by the organisms that eat them.How would this change affect the food web? Check all that apply.

A
It will increase the grass population.
B
It will increase the fox population.
C
It will decrease the shrew population.
D
It will decrease the snake population.
E
It will increase the grasshopper population.

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