Question

internal and external forces
12 which forces do scientists believe are responsible for the movement of earths tectonic plates?
a ocean currents and trade winds
b rotation of earth and the tides
c convection and gravity
d weathering and erosion
13
____ is a process that explains the large - scale movements of the earths lithosphere.
which phrase completes the statement?
a global warming
b plate tectonics
c physical weathering

Explanation:

For question 12, convection in the mantle and gravity are the main forces driving tectonic - plate movement. Ocean currents, trade winds, Earth's rotation, tides, weathering, and erosion are not the main forces for tectonic - plate movement. For question 13, plate tectonics is the theory that explains large - scale movements of the Earth's lithosphere. Global warming is related to climate change, and physical weathering is about the breakdown of rocks.

Answer:

1. C. convection and gravity
2. B. Plate tectonics