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Thursday, January 17, 2013

Use a Parallel Time Line Skills

Use a Parallel Time Line

1.    Why Learn This Skill?
Just as maps help you understand where something happened, time lines help you understand when something happened. Time lines let you put events in sequence.
Some time lines are simple to read and understand. Others, such as the one below, are more difficult. It is important to look at complex time lines carefully to be sure you understand them fully.

2.    Think About Time Lines
The time line you see on this page is a parallel time line. It is really several time lines in one. Parallel time lines are useful if you want to show related events. You could show when the same kind of events happened in different areas. Or you could also show events that happened in different places at the same time.

Each section of this parallel time line is divided into spans of 2,000 years, begging 8000 B.C. and ending at A.D. 2000.

The abbreviation B.C. stands for "before Christ." A.D. stands for anno Domini, a Latin phrase meaning "in the year of the Lord." This abbreviation tells how many years have passed since the birth of Jesus Christ. Some time lines are labeled B.C.E. and C.E. rather than B.C. and A.D. The abbreviation B.C.E. stands for "before the Common Era" and C.E. stands for "Common Era." The terms B.C.E. and C.E. refer to the same years as B.C. and A.D.

No one knows exactly when some events happened long ago. Therefore, a date on a time line sometimes is approximate, or not exact. This usually means that the earliest evidence, or proof, is from about that time. Approximate times are often shown after the Latin term circa, or c., its abbreviation. The term circa means "about."

The time line on page 70 shows when agriculture developed during the Stone Age in different geographic regions. The Stone Age is divided into two parts. The Paleolithic period, or Old Stone Age, is the time before 8000 B.C. The Neolithic period, or New Stone Age, is the time from 8000 B.C. to as late as the present day. j    During the Paleolithic period, all people were hunters and gatherers. During the Neolithic period, people began to domesticate plants and animals.

3.    Understand the Process
Look down the left-hand side of the time line. Find the top bar labeled Africa. What is the first date that is highlighted on the top bar? If you said 6000 B.C., you are right. Under that date are the words Northern Africa. This means that agriculture began in northern Africa about 6000 B.C. Now look at the other bars on the time line. In which regions of the world did people develop agriculture at about the same time?

4.    Think and Apply
Make a parallel time line comparing important events in your life with events in the lives of family members or friends. Make sure that your time line has a bar for each person and a title. Write three questions for a classmate to answer using your time line.

The following suggestions will help you make your time line:
•    Identify the events you want to show.
•    Determine the length of time over which the events took place.
•    Make the time line, divide it into equal parts, and mark the years on it.
•    Add the events you want to display. It is always a good idea to double-check the dates of events to be sure your information is accurate.
•    Give your time line a title that explains its contents.


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