How Ancient Oceans of Magnia May have Boosted Earth's Oxygen Levels.

Based on the graph, which statement best represents the findings about the proportion of ferric iron created at different temperatures and different pressures?

As pressure increased, the proportion of ferric iron decrease at 1,773 kelvins but increased at 2,473 kelvins.

Based on the passage, the design of the lab experiments performed by Armstron and colleagues helped to rule out which potential explanation for their findings?

At high pressures, differences in the proportion of ferric iron produced by the experiments could be attributed to differences in the initial amount of ferrous iron added to the synthetic mantle.

Which Choice best supports the idea that Armstrong and colleagues hypothesis about ferrous iron decomposition in early Earth's magma may have implications beyond its effect on the oxygen content in early Earth's mantle?

Lines 12-13 ("The cause . . . mystery")

Which choice provides the best evidence for the answer to the previous question? [Based on the passage, which finding, if true, would most likely call into question the explanation for the levels of ferric iron in earth's mental put forth by Armstrong and colleagues?/// The pressures in the ancient magma oceans were insufficient to result in the processes investigated in the laboratory.]

Lines 30-34 ("Scientists . . . iron")

Which statement about the proportion of ferric iron is best supported by the data in the graph?

The greatest proportion of ferric iron was produced at a temperature of 2,473 kelvins and 25 gigapascals of pressure.

Based on the passage, which finding, if true, would most likely call into question the explanation for the levels of ferric iron in earth's mental put forth by Armstrong and colleagues?

The pressures in the ancient magma oceans were insufficient to result in the processes investigated in the laboratory.

Based on the passage, which statement best explains the data presented in the graph regarding the proportion of ferric iron measured at 5 gigapascals of pressure and at 20 gigapascals of pressure?

There was a lower proportion of ferric iron at 5 giga pascals of pressure than at 20 gigapascals of pressure, because ferrous iron was able to withstand the stress of the lower pressure without converting to two kinds of iron.

The main purpose of the fourth paragraph (lines 18-25) is to

detail the level of progress that had been achieved before the current study.

The main purpose of the seventh paragraph (lines 45-48) is to

illustrate the extreme conditions in the simulation by describing a hypothetical situation.

As used in line 62, "boost" most nearly means

increase.

As used in line 18, "curiosity" most nearly means

investigation.