The earth’s inner core is a solid ball of iron, nickel and other metals, while the outer core is liquid metal composed of iron and nickel as well. The temperature of the inner core is estimated to be about 5,400 degrees C or 9,800 degrees F, far beyond iron’s melting point.
Explanation:
Catastrophism is the theory that the Earth has largely been shaped by sudden, short-lived, violent events, possibly worldwide in scope, this contrast with Uniformitarianism that suggests that the landscape developed over long periods of time through a variety of slow geologic and geomorphic processes.
To meaningfully study the past, we must assume the same or similar mechanisms operated then as now, following this idea we conclude that uniformitarianism is a more logical theory, <em>geologists then consider periodic catastrophe (volcanic eruptions, earthquakes, meteorite impacts, and storm deposits) is one of those processes uniformitarianism suggests.</em>
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The answer is: HIGH POROSITY.
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(although low permeability can be associated with greater water retention. Permeability can be affected by particular size. For instance, larger particular have larger poles, so fluid (water) can pass through water quickly (higher permeability and less water retention). As such, smaller particles have smaller pores, so fluid (water) can pass through water LESS quickly (lower permeability and RETAINING MORE WATER.).
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However, "high porosity" is the best choice.
