Why isn’t the crust of Venus broken into mobile plates as Earth’s crust is? How do you know?
a. Venus’s crust is much thicker and denser than Earth’s, so that probably prevents the crust from breaking. Moreover, there are no shield volcanoes on Venus.
b. The mantle of Venus consists of great amounts of sulfur and fluorine, which makes mantle substances more solid and less plastic. So there are no traces of magma eruptions on Venus.
c. Strong winds in the dense atmosphere of Venus sufficiently get rid of the interior heat, so there are no interior currents of matter to drive plate motion. Moreover, there are no shield volcanoes on Venus.
d. Low-density, dryness, and pliability of Venus’s crust probably prevented it from breaking into rigid plates. On Venus there are no chains of composite volcanoes that form at plate boundaries.
Ans: d. Low-density, dryness, and pliability of Venus’s crust probably prevented it from breaking into rigid plates. On Venus there are no chains of composite volcanoes that form at plate boundaries.
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