Rock is composed of different combinations of minerals. Smaller rocks come from the breakage and weathering of bedrock and larger rocks. Soil is made partly from weathered rock, partly from plant remains--and also contains many living organisms. Benchmark 4C The Physical Setting: Processes that Shape the Earth Grades 6-8, page 73
The Celts (/ËkÉlts/ , occasionally /ËsÉlts/ , see pronunciation of Celtic) were people in Iron Age and Medieval Europe who spoke Celtic languages and had cultural similarities, although the relationship between ethnic, linguistic and cultural factors in the Celtic world remains uncertain and controversial.
From around 750 BC to 12 BC, the Celts were the most powerful people in central and northern Europe. There were many groups (tribes) of Celts, speaking a vaguely common language. The word Celt comes from the Greek word, Keltoi, which means barbarians and is properly pronounced as Kelt.Interesting fact.o-one called the people living in Britain during the Iron Age, Celts until the eighteenth century. In fact the Romans called these people Britons, not Celts. The name Celts is a 'modern' name and is used to collectively describe all the many tribes of people living during the Iron Age.