1. The Asthenosphere plays an important part in the movement of the plates in the lithosphere. Which of the following best explains the occurrences in the asthenosphere that result to the movement of plates?

A. The heat causes the particles in the said layer to move downwards to the core, thus the movement of lithosphere above it.

B. The heat makes the particles in the said layer to move in a cyclic motion, up as heated, down as cooled near the lithosphere.

C. The excessive heat leads the particles in diff. directions, down to the inner core or up to the crust.

D. The added heat from the inner core causes it to break apart.


2. The Plate Tectonics Theory explains the effect of the variation of temperatures in the different layers of the Earth which causes the movement of the plates. Which of the following best states the main goal/scope of the said theory?
A. It is a theory that explains the distribution of oceans and land masses in the planet.
B. This theory explains the changes or deformation of the Earth’s crust due to the plate movements.
C. This theory illustrates the formation of the Earth and its history.
D. A theory that illustrates the different properties of the layers of the earth & their effects to daily lives.