Archaeology is digging history. They dig carefully by using brushes, not shovels. They use the same tools that dentists use. They use grids to keep track of where stuff is. They find old trash like the solid gold model boat from 100 BC. They found it in a field in Ireland. They use what they find to understand history. Like the gold boat is priceless because it tells them that they could use gold and they made boats to travel. Archaeologists find out a lot about ancient people from long ago.
Source: Archaeologists Dig for Clues by Kate Duke; The Usborne Introduction to Archaeology by Abigail Wheatley & Struan Reid.