According to many scientists, it is ______ that people from Asia crossed a land bridge that entered North America at least 12,000 years ago.
probable
15
These people came from northeast Asia, the land _____to what is modern - day Alaska.
adjacent
15
These tribes were _______ people who eventually moved south through areas of Canada into what is now the United States.
nomadic
15
As they entered warmer _______, there were major differences in the climate and natural surroundings.
latitudes
15
These _____ saw plains and huge forests of spruce and fir.
migrants
15
Theses lands had been _____ by people and were overflowing with animals, fish, and many different kids of plants.
uninhabited
15
The _______ of today's Native Americans became skillful hunters and fishers.
forebears
15
Like their ___________, those early people respected the land around them and the animals living on it, and they took only what they needed to survive.
descendents
15
They ____________ that they were prepared to meet the challenges of this new enviornment.
demonstrated
15
The wandering spirit of these people had taken them far away from the _________ that they first crossed to enter this new world.
