Early Humans Crossword Puzzle

QUESTIONS LIST: mesolithic era : middle stone age, archaeologist : a scientist who studies prehistoric people, agriculture : the process of farming, ice age : time period in which huge ice glaciers cover the earth's surface, hominid : early ancestor of humans, neolithic era : new stone age, paleolithic era : the old stone age, hunter gatherers : early humans who hunt animals and gather wild plants, nomad : early humans who move from place to place, land bridge : a strip of land connecting two continents