Question

The earth's crust is broken up into a series of more-or-less rigid plates that slide around due to motion of material in the mantle below. Although the speeds of these plates vary somewhat, they are typically about 5.20 cm/yr. Assume that this rate remains constant over time. 1.) If you and your neighbor live on opposite sides of a plate boundary at which one plate is moving northward at 5.20 cm/yr with respect to the other plate, how far apart do your houses move in a century? 2.) Los Angeles is presently 550 km south of San Francisco, but is on a plate moving northward relative to San Francisco. If the 5.20 cm/yr velocity continues, how many years will it take before Los Angeles has moved up to San Francisco?

          The earth's crust is broken up into a series of more-or-less rigid plates that slide around due to motion of material in the mantle below. Although the speeds of these plates vary somewhat, they are typically about 5.20 cm/yr. Assume that this rate remains constant over time.

1.) If you and your neighbor live on opposite sides of a plate boundary at which one plate is moving northward at 5.20 cm/yr with respect to the other plate, how far apart do your houses move in a century?

2.) Los Angeles is presently 550 km south of San Francisco, but is on a plate moving northward relative to San Francisco. If the 5.20 cm/yr velocity continues, how many years will it take before Los Angeles has moved up to San Francisco?

Added by Donna P.

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