Question

What is the meaning of plate tectonics in Paragraph 3?
A. the outer shell of the earth’s crust
B. the formation of mountains and volcanoes
C. a horizontal displacement of land after an earthquake
D. a mosaic of plates that slide over the upper mantle

Answer 1

(3) The scientific information gathered during the 1906 earthquake became key evidence in the
theory of plate tectonics. The idea of plate tectonics is that the earth’s outer shell is broken into a mosaic of
oceanic and continental plates that slide over the uppermost layer of the mantle. These plates are constantly
moving. Where they intersect, mountains form and earthquakes and volcanoes occur.

Answer 2

@chosenmatt

Answer 3

c.