Exponential and Logarithmic Functions · Algebraic Thinking

Logarithmic Scales in Science

Applying logarithms to measure intensity in pH, decibels, and the Richter scale.

Key Questions

  1. 1Why is a logarithmic scale more effective than a linear scale for measuring earthquake intensity?
  2. 2How does a change of one unit on a pH scale represent a tenfold change in concentration?
  3. 3When should a scientist choose to plot data on a semi log graph?

ACARA Content Descriptions

AC9M10A05
Year: Year 11
Subject: Mathematics
Unit: Exponential and Logarithmic Functions
Period: Algebraic Thinking

Suggested Methodologies

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