Earth about under the oceans to for the continents. The crust and the cold, rigid, top of the upper mantle are collectively known as the lithosphere, and it is of the lithosphere that the tectonic plates are composed. Beneath the lithosphere is the asthenosphere, a relatively low-viscosity layer on which the lithosphere rides. Important changes in crystal structure within the mantle occur at below the surface, spanning a transition zone that separates the upper and lower mantle. Beneath the mantle, an extremely low viscosity liquid outer core lies above a solid inner core. The Earth's inner core might rotate at a
This Is What the Truth Feels Like few weeks before its release. The seventh track, "Send Me a Picture", has dancehall elements, and was described as a sexting ode by several publications; furthermore, Mapes stated the song has a "Bieber-hits-the-islands vibe", while Annie Zaleski of "The A.V. Club" summarized its meaning as "captur[ing] the delicious anticipation of a crush potentially texting a snap". "Red Flag" begins with "an intro that sounds like a melting violin", followed by Stefani scorning her ex: "This is what happens when you don't listen to what your mother say." Amanda Dykan of AltWire found it reminiscent of 2000's "Ex-Girlfriend" and compared Stefani's