Earth's Ecology DVD
Oceans provide habitats for millions of marine species and cover more than 70 percent of Earth's surface. Segments detail seafloor maps, the role of water in our planet's life cycles, three states of matter, and the crucial balance among all life-forms.
- OCEANS: See how scientists explore and map of the world's oceans.
- CYCLES: Identifies water, oxygen, and nitrogen as essential to the functioning and survival of life and to the recycling of organic materials.
- WATER'S THREE STATES: Visits frigid Antarctica to study water as a solid, liquid, and gas.
- PRODUCERS, CONSUMERS, AND DECOMPOSERS: Illustrates the relationships among these life-forms and explains why a balance is necessary for the survival of the biosphere.