How does scientists know earth has a solid core surrounded by mantle when we have never dug so deep? How do that happens when IMO 12 km is the deepest we have dug?
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Just echoing that scientists use earthquakes to determine the earth’s structure. Waves travel through different materials at certain speeds. Additionally, there are two kinds of earthquake waves, one of which does not travel through the earth’s core.
More info than you probably need, but figure 7.4 should help you visualize. [https://manoa.hawaii.edu/exploringourfluidearth/physical/ocean-floor/layers-earth/compare-contrast-connect-seismic-waves-and-determining-earth-s-structure](https://manoa.hawaii.edu/exploringourfluidearth/physical/ocean-floor/layers-earth/compare-contrast-connect-seismic-waves-and-determining-earth-s-structure)
Just echoing that scientists use earthquakes to determine the earth’s structure. Waves travel through different materials at certain speeds. Additionally, there are two kinds of earthquake waves, one of which does not travel through the earth’s core.
More info than you probably need, but figure 7.4 should help you visualize. [https://manoa.hawaii.edu/exploringourfluidearth/physical/ocean-floor/layers-earth/compare-contrast-connect-seismic-waves-and-determining-earth-s-structure](https://manoa.hawaii.edu/exploringourfluidearth/physical/ocean-floor/layers-earth/compare-contrast-connect-seismic-waves-and-determining-earth-s-structure)
Actually, they’re only different on a distinct legal level.
The only difference is that an MLM is a publicly known entity that sells products.
Otherwise, they operate exactly the same. MLMs design themselves to steer clear of Amway type legal entanglement.
Actually, they’re only different on a distinct legal level.
The only difference is that an MLM is a publicly known entity that sells products.
Otherwise, they operate exactly the same. MLMs design themselves to steer clear of Amway type legal entanglement.
There are two main types of vibrations produced by earthquakes, P-waves and S-waves. They move through solids and liquids very differently. Networks of seismographs on the surface can reveal the patterns of movement, even through the center of the core. These patterns can be analyzed to show the state of matter deep inside earth. ( very similar to the software that enables CAT scan xrays to show images of your insides)
The Wikipedia article on this is excellent, with great diagrams:
https://en.m.wikipedia.org/wiki/Seismic_wave
There are two main types of vibrations produced by earthquakes, P-waves and S-waves. They move through solids and liquids very differently. Networks of seismographs on the surface can reveal the patterns of movement, even through the center of the core. These patterns can be analyzed to show the state of matter deep inside earth. ( very similar to the software that enables CAT scan xrays to show images of your insides)
The Wikipedia article on this is excellent, with great diagrams:
https://en.m.wikipedia.org/wiki/Seismic_wave
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