Choose three major inventions that have led to successful products. who were the inventors? how did they invent the technology?

1. The Gas Turbine.

2. The Radio Transmission

3.  The incandescent light bulb.

Explanation:

1. The invention of the first gas turbine by John Barber in 1791 led to the development of the commercially produced internal combustion engines.

2. Invention of the process of radio transmission by Guglielmo Marconi produced many products in the radio communications domain.

3. Heating of a wire to incandescence in 1761 by Ebenezer Kinnersley which resulted in the invention of the light bulb perfected by Edison produced the commercially produced incandescent light bulbs as successful products.

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)

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