Assuming That All Other Factors Are Equal, on a Cold

question 3

Multiple Choice

Assuming that all other factors are equal, on a cold winter afternoon the amount of dissolved O₂ in a lake will be

• A)more than on a hot day because the decreased energy in colder water makes O₂ molecules less likely to escape to the atmosphere, and biological oxygen demand will be higher than on a hot day.
• B)less than on a hot day because the decreased energy in colder water makes O₂ molecules more likely to escape to the atmosphere, and biological oxygen demand will be higher than on a hot day.
• C)more than on a hot day because the decreased energy in colder water makes O₂ molecules less likely to escape to the atmosphere, and biological oxygen demand will be lower than on a hot day.
• D)less than on a hot day because the decreased energy in colder water makes O₂ molecules more likely to escape to the atmosphere, and biological oxygen demand will be lower than on a hot day.

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