The Major Rock ClassesIgneous Rocks1.Briefly explain the difference between intrusive and extrusive rocks (cools slowly/quickly, small/large grains, fine/coarse texture, more/less dense –Note: these are the characteristics to use).(4 pts)Intrusive:Extrusive:2.These differences are related to wherethe rocks cool and solidify. In general terms, intrusive rocks cool, while extrusive rocks cool .(2 pts)3.What types of processes produce igneous rocks?(1 pt)4.What is the dominant factor that determines the grain size in igneous rocks?(1 pt)

the correct answer is amazon river

the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.