Test: The Machine Age- 2

• Copper was the first metal that man discovered in 9000 BCE.
• The weapons used by early humans were made of copper.

Iron was used by early humans to make sharp tools like swords and spears.

• Iron is excellent for making cheap iron plows, sickle, and tools. 
• Iron tools were used massively to increase agricultural production.

Through introduction of steam engines in Industrial Revolution, mass quantities of goods could be produced at lower costs.

During Industrial Revolution, people moved from villages to cities to get jobs in factories.

A machine is a tool that makes our work easier and faster with the use of less energy.

During Bronze age, the second phase of development, early humans used bronze to make tools.

Bronze is an alloy of copper and tin.

Steam Engine increased production capabilities in the factories throughout Britain.

To create the steam, most steam engines heated the water by burning coal.