9781422273340

WORDS TO UNDERSTAND

blacksmith: a craftsman who fabricates objects out of iron using hot and cold forging on an anvil (a large block of metal with a flattened surface on the top) bronze age: the first period of time in human history in which bronze (an alloy of copper and tin) was used; the start date varies by regions (for example, the Bronze Age began in China before 3000 BCE, whereas in Britain it did not start until about 1900 BCE) forge welding: a welding technique that joins two pieces of similar or different metal by heating them to a high temperature and then hammering them together gross domestic product (GDP): the total value of all goods and services produced in a country during a specific period of time, often a year

6 CAREERS WITH EARNING POTENTIAL: WELDER