Why do scientists believe Venus lacks plate tectonics?

Question

Indicate whether the statement is true or false

Answer 1

True plate tectonics are apparently not important on Venus. Although measurements by lander probes show that the surface rock on Venus is the same kind of dark-gray basalt found in Earth ocean crust, they also reveal that the crust is very dry and therefore about 12 percent less dense than Earth's crust. Venus's low-density crust is more buoyant than Earth's crust and would resist being pushed into the interior. Also, model calculations indicate that water embedded in rocks is needed to lubricate plate motion, so Venus's dry crustal rocks would not slide past each other easily. Finally, Venus's crust is so hot that it is halfway to its melting point. Such hot rock is not very stiff, so it cannot form the rigid plates typical of plate tectonics on Earth. Planetary scientists hypothesize that the low density, dryness, and pliability of Venus's crustal rocks are the reasons that planet lacks plate tectonics.

Venus also lacks linear mountain chains, has very few folded mountain belts, and has widespread volcanic occurrences –all of which would provide evidence for plate tectonics.