The formation of the solar system from a huge cloud of dust and gases is called the a. protoplanet hypothesis b. planetesimal hypothesis c. solar hypothesis d. nebular hypothesis e. none of these

Following lenins death, who took control of the soviet union

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

Which water sources contribute to a river system? check all that apply. groundwater lakes rivers streams watersheds