Early Humans Review

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

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

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

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

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

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

Our earliest ancestors came from this continent.

This is the name of the first Americans.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Homo sapiens adapted to the Ice Age cold by ________________.

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

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

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

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

To walk upright or on two feet.

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

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

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

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

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

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

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

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

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