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A prerequisite knowledge graph of 1590 learning concepts across 8subjects. Track what you've mastered and see exactly what you're ready to learn next — the topics whose prerequisites you've already met. Built on the Marble Open Skill Taxonomy.

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Midnight Sun & Polar Night

Science · Polar Regions · conceptual

Know that at the poles, daylight and darkness are extreme — in summer the Sun never fully sets (midnight sun) and in winter the Sun never rises (polar night lasting months) — and that this is very different from what we experience at home, where every day has both daylight and darkness

What mastery looks like

  • Describe midnight sun: in polar summer, the Sun stays above the horizon all day and night
  • Describe polar night: in polar winter, the Sun stays below the horizon for weeks or months
  • Compare this to normal day-night patterns at home, noting the dramatic difference

Check your understanding

Does Midnight Sun & Polar Night know the amazing fact that at the poles, the Sun doesn't set at all in summer and doesn't rise at all in winter — so there can be months of daylight or months of darkness?

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