Lab

1)Fresh water can hold more oxygen than salt water
2)Cool water can hold more dissolved oxygen than warm water, which is why the
fish died in the hot aquarium.
3)A clear pond will hold more oxygen than a pond with heavy alga mat. Despite photosynthesis,
the decay of so much organic matter will result in the depletion of oxygen.

Photosynthesis equation
6CO₂ + 6H₂O  C₆H₁₂O₆ + 6O₂