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1.4 The Biosphere

Discover the intricate web of life contained within the biosphere, from the ocean floor to mountain peaks. Learn how organisms adapt to varying pressures, temperatures, and oxygen levels, and interact with the lithosphere, hydrosphere, and atmosphere.

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1.4 The Biosphere

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  1. 1.4 The Biosphere ·All parts of Earth that support and contain life ·Contains lithosphere, hydrosphere and atmosphere ·From floor of ocean to top of highest mountain • 12.4 mis. or 20 km thick

  2. Life is limited due to pressure, temperature and O2 From 0.5 mis. below surface of ocean to 3.5 mis. above sea level Below this, too high of pressure and very little food Above this, air pressure is too low and temperatures are too cold Organisms obtain materials they need from the biosphere 1.air from the atmosphere 2.water from the hydrosphere 3. food from the lithosphere Life on Earth

  3. Organisms are affected by changes in the biosphere • A change in composition of seawater affect organisms in ocean • Eruption of a volcano affect organisms in the surrounding area

  4. Biosphere is affected by what organisms do • Damming of a river by a beaver • Release of gases by a factory

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