Jun 10, 2016 · Learn how carbon moves through Earth's ecosystems and how human activities are altering the carbon cycle.

The ways in which an element—or compound such as water—moves between its various living and nonliving forms and locations in the biosphere is called a biogeochemical cycle. …

Atmospheric carbon combines with water to form a weak acid—carbonic acid—that falls to the surface in rain. The acid dissolves rocks—a process called chemical weathering—and …

The water cycle is important in itself, and patterns of water cycling and rainfall have major effects on Earth's ecosystems. However, rainfall and surface runoff also play important roles in the …

This simplified diagram shows the biological and geological carbon cycles, highlighting the processes that transfer carbon between the Earth’s atmosphere, biosphere, hydrosphere, and …

This spike in oxygen usage can sharply lower dissolved oxygen levels in the water and may lead to death by anoxia —lack of oxygen—for other aquatic organisms, such as shellfish and …

Biogeochemical cycles are nature's way of recycling essential elements for life, like water, carbon, nitrogen, and phosphorus. These cycles circulate these molecules through ecosystems and …

During the geological carbon cycle, carbon moves from rocks on land into the oceans via weathering and rainwater runoff. Carbon also enters oceans from the atmosphere as carbon …

Jul 17, 2016 · In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct. The …

During cellular respiration, a glucose molecule is gradually broken down into carbon dioxide and water. Along the way, some ATP is produced directly in the reactions that transform glucose.