The biosphere is a global ecosystem composed of living organisms (biota) and the abiotic (nonliving) factors from which they derive energy and nutrients. Earth's environment includes the atmosphere, the hydrosphere, the lithosphere, and the biosphere.

CHAPTER 2

CHAPTER 2OUR SOLAR SYSTEM AND EARTH

CHAPTER 2OUR SOLAR SYSTEM AND EARTHEver since the Big Bang, the Universe has been drifting and expanding. The birth and death of stars leave an aftermath of galaxies, planets, and even living organisms.

CHAPTER 2OUR SOLAR SYSTEM AND EARTHEver since the Big Bang, the Universe has been drifting and expanding. The birth and death of stars leave an aftermath of galaxies, planets, and even living organisms.Watch the Earth transform from a violent, molten rock to a supporter of life. Discover how astronomers use collective learning to put our planet in its proper place. And learn about Earth's drifting surface that causes earthquakes, volcanic eruptions, and continental "surfing."