Finding the Main Idea Benjamin Franklin: Scientist and Inventor
While Benjamin Franklin is known as a statesman
and diplomat, he was also an accomplished inventor
and scientist. Franklin was mainly a printer
by profession, but he also investigated natural
phenomena, such as ocean currents and lightning. His
marine research led to his publication of a map of the
Gulf Stream currents. Franklin developed theories
about electricity, made famous by his experiment with
a kite and a key during a lightning storm. As a result
of his work with electricity, Franklin invented the
lightning rod, which protected buildings from lightning
strikes. Always curious and imaginative, Franklin also
invented the bifocal glasses, the Franklin stove, an
odometer for carriages and a musical instrument called
a glass armonica. He investigated evaporation as a
cooling technique and designed nautical enhancements,
including watertight compartments,
From Franklin's
paper "Water-spouts
and Whirlwinds"
Write the main idea of the paragraph in the center circle below,
Write the supporting ideas in the outside circles.​

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