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término		definición
Give two examples of simple prehistoric machines empezar lección		the club, the oar
What kind of power did this machines use? empezar lección		human, animal, water, wind, steam
How was the power in these machines transformed? empezar lección		With the forces multiplied and the speed reduced
What were gears(toothed wheels) used for? empezar lección		to regulate the speed of rotation
what is a crank? empezar lección		A crank is a device for changing reciprocating motion into rotary motion or vice versa
What is transportation? empezar lección		Transportation is a physical movement or flow of goood
What mode of transport is a cheapest empezar lección		water
what mode of transport is the most expensive and fastest empezar lección		air
What type of products are water-based modes of transport used for? empezar lección		commodity type products, such as grain, coal, and ore
What is ICA?* empezar lección		the Interstate Commerce Act
What is intermodal transport empezar lección		transport that uses more that one mode of transportation

The Very Beginnings of the engine