Log in
Sign up for FREE
arrow_back
Library

Biogeochemical Cycles Intro

star
star
star
star
star
Last updated over 3 years ago
5 questions
1
1
1
1
1
Question 1
1.

The amount of water on earth changes over time.

Question 2
2.

Carbon, Nitrogen, Phosphorus, and Water all cycle through the Earth using natural and human processes.

Question 3
3.

Humans do not affect the nitrogen cycle.

Question 4
4.

Fossil fuels are a source of carbon.

Question 5
5.

Animals obtain carbon by eating plants or other animals.