This courseware mainly focuses on winter day length. It explains day length concept and the light - Earth - season relationship. Using Lucas's after - school activities, it shows winter has shorter days. Taking Sam's observations as an example, it introduces observing day length by recording sunset time, explains time - telling with a clock, gives winter sunset times, and notes Dec 21st is usually the shortest day in the UK.


Main Content:
1.Section on the Basic Concepts of Day Length Changes in Winter
2.Observing Winter Days: Exploring the Mysteries of Time and Light

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