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Difference between Era and Period

Difference between Era and Period

There is a lot of confusion surrounding the words “era” and “period.” Both are used to describe time, but they have different meanings. An era is a long period of time that is marked by distinct events or changes. A period, on the other hand, is a shorter segment of time that is typically characterized by similar events or changes. It’s important to understand the difference between these two terms because you use them in different contexts. For example, you might say “the Paleolithic Era” but “the Industrial Revolution Period.”

What is Era?

Era is a geological period of time. Each era is characterized by specific life forms that existed during that time. For example, the Mesozoic Era is often called the age of dinosaurs because that was when dinosaurs roamed the earth. Era is determined by the fossil record, which is the evidence of past life forms that are preserved in rocks. By studying the fossil record, scientists can learn about the history of life on earth and how different species have evolved over time. Era is just one way of categorizing rocks and fossils. Geologists also use other methods, such as period and epoch, to study the Earth’s history.

What is Period?

A period is a unit of time. The SI unit for time is the second. The base unit of time in the International System of Units (SI) is the second. Seconds are measured using a clock. A second is equal to 1/60th of a minute, or 1/3600th of an hour. Periods can be measured using a calendar. A year is 365 days long, and there are 24 hours in a day. There are 12 months in a year, and each month has 31 days except for February, which has 28 days.

Periods can also be measures using astronomical events. For example, one day on Earth is defined as the time it takes for the planet to complete one full rotation on its axis. One year on Earth is defined as the time it takes for the planet to complete one full orbit around the sun. Periods can also be measure using natural phenomena, such as tides and seasons. Tides are caused by the gravitational pull of the moon on the earth’s oceans. The earth’s orbit around the sun causes seasons. Periods can also be arbitrary, such as the length of a school day or work week.

Difference between Era and Period

Era and period are both used to describe a length of time, but they have different meanings. An era is a long, defined span of time that is associated with a major event or series of events. periods are smaller divisions of time that are typically used to describe more specific events within an era. For example, the dinosaurs lived during the Mesozoic Era, which is broken down into three periods: Triassic, Jurassic, and Cretaceous.

Era and period can also be used as nouns to refer to the people or events associated with those spans of time. For example, the Victorian Era is named for Queen Victoria, who ruled England during that time. Similarly, the Renaissance was a period of great cultural and artistic achievement in Europe that began in the 14th century. In general, era is used to describe a longer span of time, while period is used for shorter spans or specific events within a longer era.


In short, an era is a long period of time characterized by certain events or developments, while a period is a shorter time frame within an era. It’s important to be aware of the distinction when studying history (or anything else that spans multiple periods), as using the wrong term can result in confusion and misinformation.

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