The water of hypersaline bodies of seawater is enriched in oxygen 18 because ___
ID: 290708 • Letter: T
Question
The water of hypersaline bodies of seawater is enriched in oxygen 18 because _______.
the high rate of evaporation preferentially produces hypersaline water
the high rate of evaporation preferentially adds water molecules containing oxygen 16
the high rate of evaporation preferentially removes water molecules containing oxygen 18
the high rate of evaporation preferentially removes water molecules containing oxygen 16
How have changes in the overall volume of mid-ocean ridges altered the chemistry of seawater?
The O2 / Mg++ ratio of seawater has changed.
The CO2 / Mg++ ratio of seawater has changed.
The Mg ++ / Ca++ ratio of seawater has changed.
The overall volume of mid-ocean ridges has not altered the chemistry of seawater in any way.
What important consequences have resulted from changes in the chemistry of seawater?
It has influenced strongly which kinds of organisms become the dominant photosynthesizers on land.
It has influenced strongly which kinds of organisms have functioned as major reef builders and sediment producers.
It has influenced strongly which kinds of fish have evolved in the oceans and functioned as major carnivores.
There have been no important consequences in the oceans due to altered seawater chemistry.
the high rate of evaporation preferentially produces hypersaline water
the high rate of evaporation preferentially adds water molecules containing oxygen 16
the high rate of evaporation preferentially removes water molecules containing oxygen 18
the high rate of evaporation preferentially removes water molecules containing oxygen 16
Explanation / Answer
1) The water of hypersaline bodies of seawater is enriched in oxygen 18 because the high rate of evaporation preferentially removes water molecules containing oxygen 16.
2) changes in the overall volume of mid-ocean ridges altered the chemistry of seawater as The Mg 2+ / Ca++ ratio of seawater has changed with time. a smaller mid-ocean ridge hydrothermal brine flux results in lower concentrations of Ca2+ in seawater and higher concentrations of Mg2+.
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