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Answer:

See below  

Step-by-step explanation:

There are several reasons why the water in a stream may contain more dissolved oxygen than the water in your hous e:

  1. It is exposed to the atmosphere, so it can absorb oxygen from the air. Tap water sits in pipes, away from the atmosphere.
  2. It is in motion, so turbulence brings more water to the surface and in contact with the atmosphere. Tap water is usually stagnant (not moving).
  3. It is colder than tap water. The solubility of oxygen in water decreases as temperature increases,
  4. Plant life in the stream releases oxygen into the water.

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