What type of tectonic plate boundary is along the west coast of the
united states?

Fossils of glossopteris, an extinct fern, were discovered on which continents to support the theory of continental drift? check all that apply.

This desert is found in the northern part of africa and covers 3.5 million square miles.

All of the following statements ere innovations that benefited farmers during the second agricultural revolution expect a. the iron plough b. the railroad c. animal husbandry d. plant domestication