What group of native americans did not have a system of writing?

About how many european immigrants were processed at the facilities on ellis island

Which number shows the location of the united kingdom of great britain?

What do most climatologists see as a major cause of rising global temperatures? a. earth's closer proximity to the sun due to its gravitational pull b. greenhouse gases produced by burning fossil fuels c. rising ocean levels caused by melting polar ice sheets d. water pollution cause by industrial waste