A group of 100 years is known as a(n)

• century

• decade

• era

• millennium

The Gregorian calendar

• lost one day every 128 years.

• is also known as the Hebrew Calendar.

• was developed by Pope Gregory.

• was developed by Julius Caesar.

The study of human culture and how it develops over time is called

• archaeology.

• anthropology

• prehistory

• paleontology

The most important fact that helped scientists connect modern humans to their ancient ancestors regarding the discovery of the skeleton “Lucy” in Africa in 1974 was that it

• had short arms and shorter legs.

• was 12 feet tall.

• was 3.2 million years old.

• walked on hands.

Historians can learn about ancient civilizations by studying items such as weapons, tools, and pottery, which are called

• fossils

• species

• treasure

• artifacts

The remains of plant and animal life from an earlier time are called ___________.

• fossils

• species

• treasures

• Artifacts

A group of ten years is known as a ______________.

• Millennium

• Century

• Day

• Decade

The first historical era, more than 5,500 years ago, is called _________________ and refers to a time before people developed writing.

• Prehistory

• Ancient History

• Middle Ages

• Modern History

Time period after Prehistory that ended A.D. 500

• Prehistory

• Ancient History

• Middle Ages

• Modern History

Time period between A.D 500 and A.D. 1400 is called

• Prehistory

• Ancient History

• Middle Ages

• Modern History