Question

1. choose the best answer.

in which zone is most of the earths material found?
the core
the mantle
the mohorovicic discontinuity
the crust

1. choose the best answer.

the process by which a continental plate slides beneath another is ____.
reduction
downgrading
subduction
demotion

Explanation:

• For question 14: The mantle makes up about 84% of the Earth's volume. The core is mainly composed of iron and nickel and has a smaller volume compared to the mantle. The Mohorovicic discontinuity is a boundary, not a zone with a large amount of material. The crust is the outermost and thinnest layer.
• For question 15: Subduction is the process where one tectonic plate (including continental plates in some cases) slides beneath another. Reduction is a chemical process (e.g., in redox reactions). Downgrading usually refers to making something lower - grade in a non - geological sense. Demotion is a term used in a social or organizational context, not for geological plate movements.

Answer:

1. the mantle
2. subduction