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Why Polar Seasons Are Extreme

CONCEPTUAL
Science›Polar Regions|Ages 7—9|ID: mt_f9syMry-0S

Understand why the poles have extreme seasons — Earth's axis is tilted at about 23.5°, so as it orbits the Sun, each pole spends half the year tilted toward the Sun (continuous daylight, warmer summer) and half tilted away (continuous darkness, bitter winter); this tilt also drives the annual cycle of sea ice expanding in winter and retreating in summer, and triggers animal behaviours like migration and breeding

Mastery Evidence

  • Explain that Earth's axis is tilted at about 23.5° and this tilt causes the extreme polar seasons
  • Describe how the tilt means each pole faces toward the Sun for half the year (summer/daylight) and away for the other half (winter/darkness)
  • Connect the seasonal cycle to at least one animal behaviour, such as migration or sea ice retreat affecting hunting

Assessment Prompt

“Can [child] explain WHY the poles have months of daylight in summer and months of darkness in winter — that it's because Earth is tilted on its axis as it goes around the Sun?”

Prerequisites2

Show full prerequisite tree
  • Midnight Sun & Polar Night hard

    Must know about midnight sun and polar night before learning WHY they happen (Earth's tilt)

    • Where Are the Poles? hard

      Must know about the poles before understanding extreme day/night cycles there

  • Ice & States of Matter soft

    Understanding ice types enriches the connection between seasons and sea ice cycles

    • Ice & Snow hard

      Basic ice and snow knowledge is prerequisite to understanding states of matter and ice types

Unlocks1