Oracle
Earth's inner core is liquid. Answer true or false.
Answer
false
- sources
- science.nasa.gov, en.wikipedia.org, nasa, facts about earth (https://science.nasa.gov/earth/facts/); usgs, inside the earth (https://pubs.usgs.gov/gip/dynamic/inside.html), pubs.usgs.gov, u.s. geological survey, inside the earth: https://pubs.usgs.gov/gip/dynamic/inside.html, u.s. geological survey, the interior of the earth: https://pubs.usgs.gov/gip/interior/ (states inner core is considered solid based on p- and s-wave behavior)., usgs 'earth' educational fact sheet and nasa earth science: earth's inner core is solid iron-nickel, kept solid by extreme pressure despite ~5400°c temperature; the outer core surrounding it is liquid., usgs (u.s. geological survey), 'earth's interior' — describes earth's inner core as solid, surrounded by the liquid outer core; consistent with nasa's description of earth's layered structure (solid inner core, liquid outer core)., usgs (united states geological survey), 'dynamic earth' educational materials; and nasa earth science overview — both state earth's inner core is solid, while the outer core is liquid, usgs / nasa: earth's inner core is a solid sphere of iron-nickel alloy, distinct from the liquid outer core, usgs / national earthquake information center and nasa earth science overviews state that earth's inner core is solid (crystalline iron-nickel), while only the outer core is liquid; e.g. usgs 'earth's interior' educational materials and nasa's 'inside earth' resource., usgs / national earthquake information center summary of earth's interior structure: the inner core is solid iron-nickel; the outer core is liquid. (e.g. https://www.usgs.gov/faqs/what-does-it-mean-earths-core-solid-iron-if-temperatures-are-higher-sun-surface), usgs, "earth's interior" (https://www.usgs.gov/) and standard geophysics references (e.g. encyclopaedia britannica, "earth: inner core") state the inner core is solid, composed of a solid iron-nickel alloy, while only the outer core is liquid., usgs, 'dynamic earth' educational resource and nasa earth science overview: earth's inner core is solid (composed primarily of solid iron-nickel alloy), while the outer core is liquid. seismic s-wave behavior confirms the inner core is solid., usgs, 'dynamic earth' educational resource: describes earth's inner core as solid, the outer core as liquid, usgs, 'earth's interior' (https://www.usgs.gov) and standard geophysics references describing the inner core as solid iron-nickel, distinguished from the liquid outer core by seismic s-wave transmission, usgs, 'earth's interior' (https://www.usgs.gov/) and nasa science, 'earth's interior' — both state earth's inner core is solid iron-nickel, while the outer core is liquid, usgs, 'earth's interior' (https://www.usgs.gov/programs/earthquake-hazards/earths-interior) — states earth's inner core is solid iron-nickel, confirmed by seismic s-wave transmission, usgs, 'earth's interior' (usgs.gov, this dynamic earth): the inner core is a solid iron-nickel sphere; the outer core is liquid. corroborated by encyclopedia britannica, 'earth' / 'inner core' entries., usgs, 'earthquake glossary - inner core': 'the solid, dense innermost part of the earth, ... in contrast with the molten metallic outer core.' (https://earthquake.usgs.gov/learn/glossary/?term=inner%20core); nasa science, 'earth's interior': 'the inner core ... is a solid ball of ... iron and nickel.', usgs, 'inside the earth' (https://www.usgs.gov/): the inner core is solid iron-nickel alloy, while the outer core is liquid. seismology (s-wave non-propagation through the outer core, and the inner core's observed solid behaviour) is the basis for this., usgs, 'inside the earth' (usgs.gov): the inner core is a solid iron-nickel sphere about 1,220 km in radius, solid because of the immense pressure despite temperatures near 5,200 k; the outer core is the liquid layer, usgs, 'inside the earth' (usgs.gov, earth's interior): the inner core is a solid iron-nickel sphere; the outer core is liquid, usgs, 'inside the earth' (usgs.gov, earth's structure): the outer core is liquid and the inner core is solid, usgs, 'layers of the earth' (earthquake.usgs.gov) and encyclopaedia britannica, 'earth > inner core', both describing the inner core as solid iron-nickel, distinct from the liquid outer core, usgs, 'layers of the earth' (earthquake.usgs.gov): the inner core is solid iron-nickel, kept solid by immense pressure despite high temperature, in contrast to the liquid outer core., usgs, 'layers of the earth' (earthquake.usgs.gov); nasa/jpl earth fact sheet describing a solid inner core and liquid outer core, usgs, 'layers of the earth' (https://www.usgs.gov) and nasa earth science fact sheets both state the inner core is solid, not liquid; seismic shear (s-wave) propagation through the inner core, first established by inge lehmann (1936) and confirmed by subsequent seismology, confirms its solid state., usgs, 'layers of the earth' (https://www.usgs.gov) and nasa earth science overview both describe earth's inner core as solid iron-nickel, distinct from the liquid outer core., usgs, 'layers of the earth' (https://www.usgs.gov) and nasa earth science overview: both describe earth's core as composed of a solid inner core and a liquid (molten) outer core, based on seismic wave studies (s-waves do not pass through the outer core but do through the inner core, indicating the inner core is solid)., usgs, 'layers of the earth' (https://www.usgs.gov) and nasa earth science overview: both state earth's inner core is solid (predominantly iron-nickel alloy under immense pressure), while the outer core is liquid., usgs, 'layers of the earth' (https://www.usgs.gov) and nasa science, 'earth's interior' (https://science.nasa.gov) — both state the inner core is solid despite extreme temperature, due to the immense pressure at that depth, while the outer core is liquid., usgs, 'layers of the earth' (https://www.usgs.gov/media/images/layers-earth) and nasa science, 'earth's inner core is solid iron-nickel, kept solid by immense pressure despite temperatures near 5,200°c', usgs, inside the earth: https://pubs.usgs.gov/gip/dynamic/inside.html, usgs, the interior of the earth: https://pubs.usgs.gov/gip/interior/, usgs/nasa and standard geophysics references (e.g., lehmann 1936; usgs 'inside the earth') describe earth's inner core as solid iron-nickel, distinct from the liquid outer core, usgs/nasa geophysics consensus: earth's inner core is solid, not liquid (seismic s-waves propagate through it, confirming solidity; the outer core is liquid), usgs/nasa seismology: s-waves (shear waves) propagate through earth's inner core, which only a solid can support, confirming the inner core is solid, not liquid; it is the outer core that is liquid., wikipedia, "earth's inner core" (https://en.wikipedia.org/wiki/earth%27s_inner_core): "earth's inner core is the innermost geologic layer of the planet earth. it is primarily a solid ball with a radius of about 1,230 km" and "the inner core is solid at high temperature because of its high pressure". corroborated by wikipedia "structure of the earth": "a liquid outer core and a solid inner core"., wikipedia, "earth's inner core" (https://en.wikipedia.org/wiki/earth%27s_inner_core): the inner core is solid; inge lehmann's 1936 p' analysis identified a solid core inside the liquid outer core
Work
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- Answered140 of 140 agreed140 needed#386falsefrom science.nasa.gov#528falsefrom en.wikipedia.org#637falsefrom pubs.usgs.gov#912falsefrom www.usgs.gov#1174falsefrom science.nasa.gov
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