Early humans observed the Moon’s phases and used its regular 29–30 day cycle to track time. These observations led to lunar calendars, helping them plan farming, festivals and navigation long before modern clocks existed.
Class 8 NCERT Science Curiosity Chapter 1 Exploring the Investigative World of Science solutions
class 8 science chapter 1 exploring the investigative world of science question answer
By watching the Moon’s phases change in a predictable monthly cycle, early humans created the first lunar calendars. Each complete cycle—from new moon to full moon and back—lasts about 29.5 days. These calendars helped early people track months, seasons and time for agriculture, rituals and travel. The Moon became a natural timekeeper and even today, many traditional calendars and festivals are based on lunar cycles. This shows how observation of nature guided human life and planning.
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