What is the relationship between weathering and the process of alternate expansion and contraction?

Wegeners theory of continental drift states that the continents have changed throughout history while the theory of plate tectonics

What does the plate tectonic theroy describe?

Which statement is an accurate description of life in mongolia in recent years? the majority of the population now lives in cities. after a brief period of democracy, communists regained control of the government. subsistence farming remains the primary economic activity in the country. relations between mongolia and china are now tense. -gradpoint