Change is a constant of life. The natural cycles that balance and regulate our Earth and atmosphere provide the necessary conditions for sustaining a diverse range of life forms on the planet. But what actually occurs in these cycles? The Cycles Collection looks at the critical role the carbon, nitrogen, phosphorous and water cycles play in the life of plants, animals, bacteria and our planet. This motion-graphics driven program simply yet clearly explains the key stages and processes of each cycle and why the cycles are so important to all life on our planet. An ideal resource for viewers seeking a scientific understanding of these cycles.

Encoded with permission for digital streaming by Infobase on May 09, 2014. Learn360 is distributed by Infobase for Films for the Humanities & Sciences, Cambridge Educational, Meridian Education, and Shopware.

The Carbon Cycle (3:34) -- The Nitrogen Cycle (4:06) -- The Phosphorus Cycle (3:49) -- The Water Cycle (3:27) -- The Water Cycle: II (4:15) -- Credits: The Cycles: Water, Carbon, Nitrogen, Phosphorus (0:03).