The Expansion of Industry

2. Your office needs a faster way to write documents instead of handwriting everything.
5. Sending messages takes too long. You need a faster way to communicate.
6. This device allowed people to communicate instantly over long distances.
8. Your factory is too dark to work at night. You need a new source of light.
10. A resource that fueled lamps and later powered automobiles.
11. You need a light bulb filament that lasts longer and is more efficient.
12. Candles and whale oil are expensive. You need a cheaper fuel for lamps and a better way to get it.

1. You need stronger metal for bridges and railroads because iron is too heavy and rusts easily.
3. This invention revolutionized office work and increased job opportunities for women.
4. This strong material replaced iron for buildings, bridges, and railroads.
5. BRIDGE You need a structure to connect two big cities over a river using new steel technology.
7. What does Edison’s invention provide for homes and factories?
9. Factories and streetcars need this, supplied by power plants.