Proslavery settlers who came to kansas from missouri in the 1800s were known as

Proslavery settlers who came to Kansas from Missouri in the 1800s were known as  Border Ruffians.

Explanation:

The Border Ruffians were a private army raised by the big slave owners of Missouri, involved in the bloody events of Bleeding Kansas, during a political race between abolitionists and slavers to determine whether Kansas, created in 1861 as a state, with two representatives in the Senate, would be a slave state or not.

Missouri slave owners actively campaigned for the United States to remain a slave country. They created political groups called the Border Ruffians, that crossed the west bank of Missouri to the neighboring lands of the Kansas Territory, where they were engaged in the armed struggle against abolitionists like John Brown.  In March 1855, the Missouri Border Ruffians invaded Kansas during the territory's first election and imposed a pro-slavery legislature.

can you explain it better

the earth’s crust is broken into separate pieces called tectonic plates (fig. 7.14). recall that the crust is the solid, rocky, outer shell of the planet. it is composed of two distinctly different types of material: the less-dense continental crust and the more-dense oceanic crust. both types of crust rest atop solid, upper mantle material. the upper mantle, in turn, floats on a denser layer of lower mantle that is much like thick molten tar.

each tectonic plate is free-floating and can move independently. earthquakes and volcanoes are the direct result of the movement of tectonic plates at fault lines. the term fault is used to describe the boundary between tectonic plates. most of the earthquakes and volcanoes around the pacific ocean basin—a pattern known as the “ring of fire”—are due to the movement of tectonic plates in this region. other observable results of short-term plate movement include the gradual widening of the great rift lakes in eastern africa and the rising of the himalayan mountain range. the motion of plates can be described in four general patterns:

collision: when two continental plates are shoved together

subduction: when one plate plunges beneath another (fig. 7.15)

spreading: when two plates are pushed apart (fig. 7.15)

transform faulting: when two plates slide past each other (fig. 7.15)