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An interval scale has the properties of an ordinal scale, but the numbers on an interval scale also have equal distances or intervals between them. There is no true zero on an interval scale which limits what we can say about values coming from the scale. Temperature in degrees Celsius is an interval scale. We can say that the interval between 5 and 10 degrees and 15 and 20 degrees is the same. We cannot say that 0 degrees is "no temperature."