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Overview
Statistics
1. CC.HSS.ID.A.1
1.1 Why learn log?
Why Learn Logarithms?
Logarithms turn huge, hard-to-compare ranges into small, readable numbers, from pH to earthquakes to sound.
What You'll Learn
A logarithm answers: what power gives this number, from this base?
The pH scale uses pH = negative log of hydrogen ion concentration.
The Richter scale measures earthquake magnitude with a base-10 logarithm of ground motion.
The decibel scale measures sound intensity using ten times the logarithm of intensity.
Logarithmic scales turn tenfold physical changes into one added step, so huge ranges become small numbers.
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Learning resources
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