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Physical Effects on Life

Physical Effects on Life. Light – Why is water blue ?. -Water both scatters and absorbs light, which typically penetrates the first 100 meters of water. -Blue light is the last to be absorbed, thus it is the reflected the most by water (this is why water is blue).

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Physical Effects on Life

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  1. Physical Effects on Life

  2. Light – Why is water blue? -Water both scatters and absorbs light, which typically penetrates the first 100 meters of water. -Blue light is the last to be absorbed, thus it is the reflected the most by water (this is why water is blue) Light is important for 3 reasons: Sight Photosynthesis Temperature

  3. Temperature – Ecto, endo, and homeotherms -Life in the ocean is nice because, unlike on land, there is a very small variance in ocean water temperature. Ectotherm – Internal temp changes with sea water. The environment determines their temperature. Endotherm/Homeotherm – Produces its own heat from breaking down food.

  4. Sound – Travels five times faster in the water than in the air. Warm water causes high speed of sound. Echolocation – the use of sound to locate surroundings. High pressure causes high speed of sound.

  5. Pressure – increases with depth. How come marine organisms aren’t crushed by the immense pressure of the ocean? Same pressure in As pressure out

  6. Ocean pressure crushing a bottle

  7. Buoyancy – Archimedes Principle “An object immersed in a liquid is pushed up by a force equal to the weight of the liquid displaced.”

  8. Drag/Streamlining Drag – the force acting in the direction opposite the motion of an organism. How do organisms deal with this force?

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