Which is the largest sphere of earth? geosphere, hydrosphere, cryosphere, biosphere, or atmosphere?

What first caused people to consider that the continents were once one large landmass?

Formidable obstacles of climate, terrain, and distance hinder exploitation of natural resources in russia. true false

Agriculture is a. slowly being replaced by mining as the primary industry in southern africa c. not possible in southern africa because of drought b. the primary industry in southern africa d. none of the above