What Observation Supports the Hypothesis That the Slab-Pull Force Is

question 47

Multiple Choice

What observation supports the hypothesis that the slab-pull force is the primary cause of plate motion?

• A) Divergent plate boundaries represent all of the upwelling expected by mantle convection.
• B) Plumes are the deep upwelling component of convection with seismically slow velocities.
• C) Earthquakes and volcanoes are concentrated at plate boundaries.
• D) Plates with long subduction zones move faster than plates with short subduction-zones.

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Definitions:

Mitotic Division

A type of cell division in eukaryotic cells by which chromosomes are equally divided to produce two identical daughter cells.

Conception

The process of fertilization when a sperm cell unites with an ovum, leading to the formation of a zygote.

Mitotic Cleavages

A series of cell divisions without growth phases that occur in the early embryo, leading to an increase in cell number and the formation of the multicellular structure.

Fertilization

The process of a sperm cell uniting with an egg cell, leading to the development of a fertilized egg or zygote.