Energy is constantly being used and re-used. Energy begins with the Sun, moves through to plants, then insects and animals, and so on. These are steps of the food chain. Organized like a pyramid, each level represents a different step to the continual recycling of energy. Learn about photosynthesis and how it works, the food chain and the species the make up each level, how energy changes between levels, and the role of carbon and other minerals. Plus, learn how the exploitation of natural resources can harm the entire pyramid of life.

Originally released by Cerebellum Corporation, 2013. Streaming video file encoded with permission for digital streaming by Infobase on July 10, 2018.

The Pyramid of Life: Introduction (1:35); --Photosynthesis (2:42); -- The Food Chain (6:42); -- Man and the Food Chain (1:27); -- The Pyramid of Life: Summary (1:46); -- Credits: The Pyramid of Life (0:48); .