Question

Which of the following statements about Earth’s cycles is not true?
a.
Earth’s cycles move matter between abiotic and biotic factors of the environment.
b.
The various cycles found on Earth are vital to life.
c.
Some of Earth’s cycles are a direct result of human action.
d.
Earth’s cycles convert nonliving elements into forms usable by organisms.

Answer 1

c.

Earth’s biogeochemical cycles are natural processes. Humans can alter or disrupt cycles (for example burning fossil fuels changes the carbon cycle, fertilizers affect the nitrogen cycle), but they do not create entirely new Earth cycles as a direct result of human action.