Question

which statement describes a difference between the lower mantle and oceanic crust?
the lower mantle is closer to earth’s surface than oceanic crust is.
the lower mantle is found closer to sea level than oceanic crust is.
the lower mantle experiences more pressure than oceanic crust does.
the lower mantle has a more tarry consistency than oceanic crust does.

Explanation:

To determine the correct statement, we analyze each option:

• Option 1: The lower mantle is deep within the Earth, while the oceanic crust is near the surface (under oceans). So the lower mantle is not closer to the surface than the oceanic crust. Eliminate.
• Option 2: Sea level is at the ocean's surface, and the oceanic crust is at the ocean floor (near sea level). The lower mantle is far below, so it's not closer to sea level. Eliminate.
• Option 3: The lower mantle is at a much greater depth (and thus under more pressure) than the oceanic crust (which is near the surface, under relatively low pressure). So the lower mantle experiences more pressure. This is correct.
• Option 4: The oceanic crust is solid and brittle, while the lower mantle is more viscous (not "tarry" in a typical sense, and the consistency description is inaccurate). Eliminate.

Answer:

The lower mantle experiences more pressure than oceanic crust does.