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

This simplified diagram of the carbon cycle shows how processes such as photosynthesis, cellular respiration, decomposition, and fossil fuel combustion move carbon between inorganic and …

The carbon cycle involves plants taking in carbon dioxide, fixing carbon, and creating organic molecules. Animals eat plants, metabolize the molecules, and release carbon dioxide.

Review your understanding of the carbon cycle with this free article aligned to NGSS and AP standards.

Jul 17, 2016 · Photoautotrophs use light energy to convert carbon dioxide into organic compounds. This process is called photosynthesis.

The carbon cycle involves plants taking in carbon dioxide, fixing carbon, and creating organic molecules. Animals eat plants, metabolize the molecules, and release carbon dioxide.

In the Calvin cycle, carbon atoms from CO 2 are fixed (incorporated into organic molecules) and used to build three-carbon sugars. This process is fueled by, and dependent on, ATP and …

The 3-carbon pyruvate molecule made in glycolysis loses a carbon to produce a new, 2-carbon molecule called acetyl CoA. The carbon that is removed takes two oxygens from pyruvate with …

Learn about the carbon cycle and the four main processes that move carbon through Earth's systems.

Overview of the Krebs or citric acid cycle, which is a series of reactions that takes in acetyl CoA and produces carbon dioxide, NADH, FADH2, and ATP or GTP. Created by Sal Khan.