Where is the greatest concentration of salt water ? a. by the equator b. in the temperature zones c. by the river entry ways d. in the polar zones

Which is not part of the definition of a family? two or more related people living together being married or in a partnership a single person living alone choices a and b

What id the primary human cause of the global warming a. storage of nuclear fuel rods b. burning of fossil fuels c. building of high-density housing d. violent conflicts over natural resources

The inner planets mercury, venus, earth, and mars were formed by