Standards of Measurement

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Presentation transcript:

Standards of Measurement Chapter 1 Section 2

Precision and Accuracy Precision describes how close measurements are to each other. Accuracy compares a measurement to the real or accepted value.

Is it Accurate or Precise?

Precise, because the targets are next to each other, but not in the center.

Is this Accurate or Precise?

Accurate, because it is close to the bulls-eye, but not close to each other.

International System of Units Developed in the 1960’s Metric System Based on units of 10

SI Prefixes Turn to page 15 of your text book

Measuring Distance