Two scourges of history which were used long ago?

There are two main types of historical sources: primary sources and secondary sources. A primary source is something that originates from the past. It can be a chronicle, a piece of pottery, or even a piece of glacial ice that gives us climate data about the levels of atmospheric carbon one thousand years ago.

Explanation:

hope it will help you have a great day bye and Mark brainlist if the answer is correct

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.

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