Categories Earth Sciences Physics & Astronomy How do we know the Earth’s interior is molten? Post author By Keith Post date January 13, 2014 No Comments on How do we know the Earth’s interior is molten? Source: J. D. Griggs, USGS. I’ll give you a hint: Source: J. D. Griggs, USGS. Continue reading “How do we know the Earth’s interior is molten?” Tags Earthquakes, Geology, Physics, Seismology, Sound, Volcanoes, Waves