Write a 200 word report about an inventor or invention from pennsylvania. you may choose an advance in technology that the state or the country as a whole, if you wish. you should present the information clearly, so that the reader knows why the inventor or invention is important to the state of pennsylvania. make sure you list your sources in the proper format at the end of the report.

FERRIS WHEEL

Explanation:

HISTORY: Before the word 'ferris wheel' came into existence, there has been several inventions similar to it for example, the 'pleasure wheel''.

Originally, Ferris wheel was designed and constructed by George Washington Gale Ferris Jr. in 1893 with a height of 264ft  and it was intended to STAND THE 1,063FT EIFFEL TOWER. Eiffel tower was the centerpiece of the 1889 Paris Exposition.

Gale Ferris was a graduate of Rensselaer Polytechnic institute and a Pittsburgh, Pennsylvania.

 He began his career in the railroad industry and then pursued an interest in bridge building. Ferris understood the growing need for structural steel and founded G.W.G. Ferris & Co. in Pittsburgh, a firm that tested and inspected metals for railroads and bridge builders.

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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)