Early Humans Review

This is the name of the first Americans.

The oldest Homo __________ fossils are around 1.5 million years old.

The correct order of our early human ancestors starting with the earliest is

A ________________ is a slow moving, huge mass of ice and snow that covered large areas of the earth during the Ice Age.

__________________ lived between 3.75 and 1 million years ago. Lucy and Salaam were both members of this hominid group.

Lucy's brain was about the size of a ____________.

During ____ periods of the Ice Age the ice melted, causing the water levels to rise and cover land bridges

Having larger and larger ______________ helped humans to become better toolmakers.

Ice Age water levels for the oceans dropped nearly 400 feet, allowing crossing from __ to N. America over Beringia.

Archaeologists usually do not find complete fossil skeletons of our early human ancestors.

Dinosaurs died out about _______________________years before our earliest hominid ancestors existed on earth.

The only primates who do not walk on all fours limbs all the time are ____________.

Fossils can be footprints left behind by ancient people and animals.

Archaeologists date the remains of early humans by measuring the amount of radioactive ________ that remains in fossils.

__ lived about 2.5 to 1.5 million years ago, used tools, had larger brains/more human like teeth than australopithecines

__ produced a colder climate, reduced the food supply, and forced movement to warmer environments.

Homo sapiens adapted to the Ice Age cold by ________________.

The name of the land bridge early humans crossed to reach North America from Asia during the Ice Age.

This communication skill was developed due to Homo sapiens larger brain size.

Our earliest hominid ancestors have been traced back over _____________________ years.

Method of dating fossils using volcanic ash/rock and the age of the fossils buried beneath or above those layers of soil

___________________ are the only species of hominins that still exist and the only living species of humans.

Our earliest ancestors came from this continent.

Allowed early humans to hunt larger animals such as elephants, rhinos, and hippos.

In Salaam the __________ ____________ moved back, giving more room for the thinking part of the brain.

20,000 years ago _________ percent of the world's surface was covered in ice.

By counting differences in DNA we can calculate how long ago humans began to diverge in what is known as the _________.

_____ were the first of our ancestors to leave Africa, as evidenced by fossils found in Europe and Asia.

Scientists can tell if a fossil remain was female by analyzing the ______________.

To walk upright or on two feet.

Meaning "handy human", they were the first human ancestor to use simple stone tools with their hands.

Homo erectus learned to adapt to the cold during the Ice Age by learning to make ____________.

We are a member of this group, meaning "wise human."

_________________, who lived around 40,000 years ago, were the first completely modern humans, who looked like us.

The first Americans crossed into North America by traveling through this waterway that is between Siberia and Alaska.

The skeleton of _ discovered by Donald Johanson was over 3.2 million years old, one of the oldest hominid fossils found.

The ape family branched into two major lines: hominins and apes. Hominins are more closely related to ________________

The tools, machines, and methods used by a culture to improve products, performance, and to save time.