What was an underlining source of tension in westward expantion during the 1850's

Slavery was forbidden in newly acquired territories.

The slave trade was outlawed in Washington, D.C.

California was made a slave state.

Tensions between slave states and free states were calmed.

Explanation:

Slavery was forbidden in newly acquired territories. The slave trade was outlawed in Washington, D.C. California was made a slave state. It increased membership in the Whig Party.

5 reasons for westward expansion-

Suggested Teaching Instructions

Gold rush and mining opportunities (silver in Nevada)

The opportunity to work in the cattle industry; to be a “cowboy”

Faster travel to the West by railroad; availability of supplies due to the railroad.

The opportunity to own land cheaply under the Homestead Act.

it is due to the halo effect as the impression of the boy created earlier.on the mind of the principle affected his decision

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)