Perm (disambiguation) facts for kids
Perm is a word that can mean several different things! It often refers to places in Russia, but it can also be a type of hairstyle, a time in Earth's history, or even a math idea. This page will help you understand the different meanings of "Perm."
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Perm: A City in Russia
The most common meaning of "Perm" is a large city in Russia. It is located on the Kama River, which is a major waterway. Perm is an important center for industry and culture in the Ural Mountains region.
Perm Krai: A Russian Region
The city of Perm is also the capital of a larger area called Perm Krai. A "krai" is like a region or province in Russia. Perm Krai is a federal subject, meaning it's one of the main parts that make up the country of Russia. It was formed in 2005 by combining the old Perm Oblast and Komi-Permyak Autonomous Okrug.
Perm Oblast: A Former Region
Before 2005, there was a region called Perm Oblast. This was a federal subject of Russia, similar to Perm Krai today. It merged with another area to create the current Perm Krai.
Historic Perm: An Ancient Land
"Perm" can also refer to a historic region in Russia. This older area existed between the 13th and 17th centuries. It covered roughly the same land as today's Perm Krai and the Komi Republic. This historic region was important for trade and culture long ago.
Perm: A Geologic Time Period
The word "Permian" comes from the city of Perm. It refers to a very long period in Earth's history called the Permian Period. This period lasted from about 298.9 million to 251.9 million years ago. It was a time when many new types of plants and animals appeared. The Permian Period ended with the largest mass extinction event in Earth's history.
Perm: A Hairstyle
When someone talks about a "perm" for hair, they mean a Permanent wave. This is a special hair treatment that makes straight hair curly or wavy. The curls are designed to last for a long time, which is why it's called "permanent."
Perm: In Math and Science
Permutation: A Math Concept
In mathematics, a "permutation" is a way of arranging things in a specific order. For example, if you have three different colored balls (red, blue, green), a permutation would be how many different ways you can line them up. The order matters in a permutation.
Perm: A Unit of Measurement
"Perm" can also be a unit of measurement. It is used to describe how easily gas or vapor can pass through a material. This is called "permeance." For example, a material with a high perm value lets a lot of vapor through. This unit is important in building design and material science.
PERM: An Early Computer
PERM was the name of an early computer. It was one of the first computers ever built. This machine helped scientists and engineers solve complex problems in the early days of computing.
