| Question 1: Although any period of ten years is a decade,[2][3] a convenient and frequently referenced interval is based on the tens digit of the calendar year, as in using ________ to represent the decade from 1960 to 1969. | |||
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| Question 2: These references are frequently used to encapsulate pop culture or other widespread phenomena that dominated such a decade, as in The Great Depression of the ________. | |||
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| Question 3: The other words for spans of years come from Latin: lustrum (5 years), century (100 years), ________ (1000 years). | |||
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