Native Americans are believed to have first settled in North America around Answers:
1) 1850
2)8000 BC
3)1000 BC
4)1492

PLEASE HELP

Atown is built on the banks of a small lake on the edge of a desert. after some time, the townspeople discover that water from the lake has become too polluted to use. describe one way that the lake may have been contaminated by the actions of the townspeople, and explain how the townspeople can remediate this problem.

Ahill is made of rock particles of different sizes. which of these agents of erosion probably caused the hill to form?

Many areas surrounding the caspian sea contain important a. rare minerals b. forestry resources c. gold and silver mines d. oil and natural gas fields