The Beringia Crossing Archaeologists study migration. Humans first migrated from Africa. But how did humans move to North America? One idea is that they crossed Beringia. Beringia was the land bridge between Asia and North America. It existed during the last ice age. A small group from Siberia in Asia may have crossed the land bridge and settled in America. Researchers found evidence for this migration. They analyzed DNA, language, and artifacts. Scientists studied the genes of American Indians and Siberian groups. Genes are inherited. They found that most American Indian groups are descended from Siberian peoples. Some groups stayed in North America. Others moved south. Some stayed in Central America. Some moved along the coast to South America. Languages are also evidence for migration. People bring their languages with them. Researchers found similarities between the North American languages and the languages of Siberia. The languages use similar rules. Artifact evidence is also important. Archaeologists have found similar stone objects in Siberia and North America. They also found similar tools. Some tools were used to make clothes. Warm clothes were needed for migration. There is evidence that hunter-gatherers crossed Beringia to reach the Americas. Why do archaeologists believe that early peoples crossed Beringia? Choose two answers. DNA evidence shows that American Indians and Siberians are related. American Indian and Siberian languages share similar rules. American Indian and Siberian art share similar patterns. DNA evidence links several American Indian tribes. Siberian tools were used to hunt effectively.

it brings together the military and civilian sectors of society to harness the total power of the nation. it is the mechanism that facilitates the successful prosecution of any conflict.it brings together the military and civilian sectors of society to harness the total power of the nation. it is the mechanism that facilitates the successful prosecution of any conflict.

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals

answer; the above statement is (false);