When jerry thought he was the only person who was assigned the job of contacting alumni for a 15-year reunion, he spent several hours on the phone each evening trying to reach members of his graduating class. when he learned that eight other people were also working on contacting the alumni, he spent only 30 minutes each night making phone calls. the process that would best explain the decrease in jerry’s effort when he learned that he was working as part of a larger group, is:

social loafing            

Explanation:

Social loafing: In social psychology, the term social loafing is defined as the phenomenon in which an individual is prone to give less effort on a particular task if he or she is involved in a group rather than working alone.

When an individual tends to work in a group then he or she tends to improve his or her accomplishment on a particular task by enhancing his or her talent and skills in that particular group. Social loafing gets promoted through the size of the group.

In the question above, the decrease in Jerry’s effort would be best described in terms of social loafing.

it would be d). more resources must be obtained to attain that combination of goods and services

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)