ICE AGE
This geological epoch lasted from about 2.6 million years ago to 11,700 years ago.
What is the Pleistocene Epoch?
This land connection once linked northeastern Asia and northwestern North America.
What is the Bering Land Bridge?
For many years, scholars believed humans first arrived in North America around this many years ago.
What is 16,000 years ago?
This early hunter-gatherer culture was especially well known for distinctive stone tools.
What is the Clovis culture?
This is the complete genetic information contained in an organism's DNA.
What is a genome?
These enormous sheets of ice covered large areas of North America during the Ice Age.
What are glaciers/ice sheets?
The Bering Land Bridge became exposed when these dropped dramatically.
What are sea levels?
Some researchers now suggest humans may have arrived as early as these two dates.
What are 23,000 or 30,000 years ago?
These carefully made stone projectile points were probably used for hunting.
What are Clovis points?
Ancient DNA can help scientists investigate relationships among populations and these.
What are migration patterns?
The Laurentide Ice Sheet covered much of this country and parts of the northern United States.
What is Canada?
Sea levels dropped because huge amounts of water became locked in these.
What are glaciers?
Scientists debate early arrival dates because they disagree about the strength and reliability of this.
What is the evidence?
Name TWO materials used to make Clovis points.
What are chert, jasper, and obsidian?
DNA evidence connects ancestors of Native American populations to ancient populations from this region.
What are Siberia and northern Asia?
Extreme cold, glaciers, difficult terrain, and dangerous animals were examples of these.
What are challenges faced by Ice Age humans
he Bering Land Bridge is important because early humans may have used it as this.
What is a migration route into North America?
Stone tools, animal remains, archaeological sites, and DNA are all examples of this.
What is evidence archaeologists use to study early humans?
Many Clovis points had this distinctive groove running along their base.
What is a flute?
Scientists must determine whether an object was actually made or modified by humans and whether this is reliable.
What is its age/dating?
Changes in climate, ice, and resources could cause people to do this.
What is migrate/move to areas with better conditions?
New discoveries about early migration show that historical explanations can do this.
What is change when new evidence is discovered?
This word means “disagreed about by researchers.”
What is debated or controversial?
More than 10,000 of these have been found at hundreds of locations across North America, giving archaeologists evidence about early technology and hunting.
What are Clovis points?
Genetic evidence suggests that migration into the Americas may have involved this rather than one single movement.
What are multiple movements of people over thousands of years?