Judge the following sentence according to the criteria given below: The melting of Arctic sea ice by rising temperatures is an example of a positive-feedback loop BECAUSE the lack of ice cover will result in the Arctic Ocean absorbing more of the Sun
's radiation. A) The assertion and the reason are both correct, and the reason is valid.
B) The assertion and the reason are both correct, but the reason is invalid.
C) The assertion is correct, but the reason is incorrect.
D) The assertion is incorrect, but the reason is correct.
E) Both the assertion and the reason are incorrect.
A
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Limestone deposits are primarily composed of the minerals halite and anhydrite. Indicate whether the statement is true or false
What substance makes ion migration easier in the later stages of magma crystallization, which allows abnormally large mineral crystals to form and create pegmatites?
A) Water B) Oxygen C) Silica D) Iron
Deep lakes with steep banks that have a small amount of plant nutrients are ____.
A. oligotrophic lakes B. eutrophic lakes C. culturally eutrophic lakes D. hypereutrophic lakes E. mesotrophic lakes
Groundwater is an important source of freshwater for human use
Indicate whether the statement is true or false