Question

7 multiple choice 1 point
what compositional layer would you travel through in the exact center of the earth?
lithosphere
crust
mantle
core
8 multiple choice 1 point
what is the main difference between the outer core and the inner core of the earth?
one is iron and one is zinc
one is liquid and one is gas
one is solid and one is liquid
one is iron and one is nickel

Explanation:

Question 7

The Earth's compositional layers are crust, mantle, and core. The exact center of the Earth is within the core (inner core is the center). Lithosphere is part of the crust and upper mantle (physical layer, not compositional), crust is the outermost compositional layer, mantle is between crust and core. So the center is in the core.

The outer core is liquid (due to lower pressure), and the inner core is solid (due to extremely high pressure). Both are mainly iron - nickel. Option A is wrong (no zinc), B is wrong (not gas), D is wrong (both have iron and nickel). So the main difference is state (solid vs liquid).

Answer:

D. core

Question 8