Question

(03.02 mc)
two students below described a part of earths middle layer:
bob: the deepest part
joe: the semi - fluid part
which part of the middle layer did bob and joe describe?
they both described the mesosphere.
they both described the asthenosphere.
bob described the mesosphere and joe described the asthenosphere.
bob described the asthenosphere and joe described the mesosphere.

Explanation:

The middle layer of the Earth is the mantle. The asthenosphere is a semi - fluid part of the upper mantle, and the mesosphere is the deeper, more rigid part of the mantle. Bob described the deepest part (mesosphere) and Joe described the semi - fluid part (asthenosphere). So Bob described the mesosphere and Joe described the asthenosphere.

Answer:

Bob described the mesosphere and Joe described the asthenosphere.