Most of the earth's landmasses is covered by a mixture of bits of rock and bit of once~living part of plants or animal. this material is called and its not fossil

pure substance: iron,copper

impure substance: water,charcoal

african americans demonstrated their newly found freedom by relocating often in search of relatives whom they had been separated from during slavery. others established schools to educate freed people and they built institutions such as churches and political organizations to advocate for their rights.