the wheel and axle was the invention that made transportation for those of you who didn't know. got it? GOOD! cause im not sayin it again ---- Actually the answer is Air Conditioning. Well for the Study island question.
steam engines
The Wheel.
The cotton gin
The Cotton Gin!
cotton gin
The invention of the cotton gin by Eli Whitney in 1793 led to a major increase in the number of slaves in the United States. The first census in 1790 counted 697,897 slaves, but by 1810 that number had grown 1.2 million slaves and increase of about 70%!
It is likely that Thomas Edison's best invention in the incandescent light bulb. It led to a massive surge in productivity in the 20th century in all industries.
The Wright brothers' invention of the airplane led to advancements in air transportation.
it led to a good transportation and easier
The 'internet'
it created many new inventions and led to advances in technology, transportation, and more
The Chinese civilization led to the invention of some tools and equipment that were used in transportation and agriculture.
the good things about the wheel consist of transportation, the ability to move large objects, and the invention of the wheel led to the invention of other important inventions such as the gear leading to the invention of automobiles.
wagon wheel
paper
The Invention of the Telegraph by Joseph Henry in 1831 led to the invention of the phone.
CD's
The hydrophone :)
The Walkman led to the invention of the iPod.