Trace fossil since a trace fossil are fossilized nests, gastroliths, burrows, footprints, etc.
When it is unchecked it keeps on going and going until it is very high this very high is C) exponential.
Simple, we weren't around during that time, so we made theories and conclusions to when life evolved on earth.
Answer:
1. The temperature of the inner core is far above the melting point of iron. However, unlike the outer core, the inner core is not liquid or even molten. The liquid outer core separates the inner core from the rest of the Earth, and as a result, the inner core rotates a little differently than the rest of the planet.
2. Like the shell of an egg, the Earth's crust is brittle and can break. ... As a comparison, the mantle might be thought of as the white of a boiled egg. At the center of the Earth lies the core, which is nearly twice as dense as the mantle because its composition is metallic (iron-nickel alloy) rather than stony.
3. What is the difference between the crust and lithosphere? The crust (whether continental or oceanic) is the thin layer of distinctive chemical composition overlying the ultramafic upper mantle. The lithosphere is the rigid outer layer of the Earth required by plate tectonic theory.
There you go I hope this helped you have a great day! :)
