This metal, a mixture of copper and tin, created a stronger material than copper alone, marking the beginning of the Bronze Age.
What is bronze?
This Chinese invention, brought to Europe around the 1400s, allowed people to cast iron.
What is casting iron?
This type of fuel, burned in a furnace, was used to produce iron during the Industrial Revolution.
What is coal?
Samuel F.B. Morse of the United States used electricity in this invention, which allowed long-distance communication.
What is the telegraph?
This type of manufacturing, which uses assembly lines, allows goods to be produced in large numbers.
What is mass production?
This era, which started around 6500 BCE, marked the use of copper tools and weapons in Anatolia.
What is the Bronze Age?
This device, used by sailors to determine their position, was an important invention in the Middle Ages.
What is the astrolabe?
In the late 1700s, wind and water was replaced by this as the major source of power.
What is steam?
This inventor is famous for creating the telephone in 1876, which also relied on electricity.
Who is Alexander Graham Bell?
This technique, perfected by Henry Ford in the early 1900s, revolutionized car manufacturing in the United States.
What is the assembly line?
The invention of this device and the ox-drawn plow were two key developments during the early Bronze Age.
What is the wheel and axle?
This invention by Johannes Gutenberg in about 1450 allowed books to be mass-produced.
What is the printing press?
In the second half of the 1800s, this started to be used as a major power source. This power source can be made into gasoline, fuel and many other products.
What is petroleum (or oil)?
This invention, demonstrated by Thomas Edison in 1879, changed how people lit their homes and businesses.
What is the electric lightbulb?
This global system of interconnected computer networks allows people to access and share information online.
What is the internet?
The Hittites of Anatolia began using this metal around 1000 BCE, which is stronger than bronze.
What is iron?
The invention of this horse collar allowed horses to pull plows and other heavy objects in the Middle Ages.
What is the padded horse collar?
This invention, created by Richard Trevithick, was powered by steam and used for transportation.
What is the steam locomotive?
This type of power was used to run electric railways in cities during the late 1800s.
What is electric power?
These devices, developed in the 1940s, started a new era of technology by allowing people to process and store information electronically.
What are computers?
This early human discovery, made about 2 million years ago, set them apart from other animals.
What is the control of fire?
This Chinese invention changed warfare and was used for centuries.
What is gun powder?
During the Industrial Revolution, coal and iron production expanded rapidly. Iron remained the main metal for building and toolmaking until the late 1800s but it was then replaced by this material.
What is steel?
This type of energy, discovered in the 1900s, harnesses the power of atoms and is used for both electric power and weaponry.
What is nuclear energy?
This medical device is implanted in the body to help regulate the heartbeat and keep it steady.
What is a pacemaker?