Question

According to plate tectonic theory, the crust of the earth is made up of series of________.
A.plate
B. movable plate
C. stationary plate
D. none of these

Answer 1

Hint: The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle.

Complete Answer:
-The heat from radioactive operations within the planet's interior results in the plates to move, periodically toward and periodically away from each other. This movement is called plate motion, or tectonic shift.

-Plate tectonics is a scientific hypothesis that characterizes the large-scale action of Earth's lithosphere. Whereas, tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere.

Looking at the above options:

Option a: Tectonic plates are the ones which are a part of the plate tectonic theory. This option is incorrect.

Option b: The plates taking part in the plate tectonic theory are movable plates. This option is correct.

Option c: The plates taking part in the plate tectonic theory can't be stationary plates. This option is incorrect.

Option d: This option stands irrelevant. Hence, it is incorrect.

Hence, the correct answer is option B.

Note:
-Tectonic plates are capable of moving because the Earth's lithosphere has greater mechanical strength than the underlying asthenosphere.

-Alfred Wegener was the one who had proposed the plate tectonic theory.

-Plate tectonics explains why and where earthquakes occur and makes it possible to make predictions about earthquakes.