The author mentions each of the following as possible contributing causes to reversals of the Earth's magnetic field ...
FlavioFebruary 16, 2016
Redistribution of seawater.
I didn't pick D because I related it to the redistribution of seawater discussed in line 45. Thus, I believed that it was part of the asteroid-impact hypothesis discussed in the third paragraph.
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Hi @Flavio, thanks for your question. Here is the textual support for each answer choice:
Answer choice (A): Lines 26-29
Answer choice (B): Lines 40-49
Answer choice (C): Lines 31-38
Answer choice (D): No textual support. Although there is mention of a redistribution of Earth's seawater (lines 45-46), there is NO discussion of changes in the circulation patterns in the Earth's oceans. This is the answer (remember: this is an "Except" question).
Answer choice (E): 40-45
Hope this helps! Please let us know if you have any additional questions.
MichelleRodJuly 20, 2017
Nowhere in the text does it say that there are temperature changes on the Earth's surface, though. Can you please explain how that has more support than the ocean circulation option?
kyleprzy10February 20, 2020
Wouldn't redistribution be the same thing as changing circulation ?
mikeheathMay 31, 2020
I agree, wouldn't climatic changes and redistribution of seawater equal changes in circulation patterns? Changes in climate involve changes in rainfall, a part of the water cycle. This question was very confusing because I thought C and D are equally vague. Option C's support says "material from the inner and outer boundaries of the fluid core". It doesn't specifically say outer core materials. Couldn't the same level of implication be used for C and D? Please help. I am doing terribly on reading passages.
Brett-LindsayAugust 12, 2020
I also chose (D), but it's definitely wrong - the water could be redistributed but retain its circulation patterns.
