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Seasons

Lesson 6

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Earth and Seasons

  • Earth is naturally tilted on an axis (it does not sit vertically straight)
  • It is tilted on a 23.5 degree angle

23.5°

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Earth and Seasons

  • The axis and movement of the earth around the sun creates the seasons that we experience throughout the northern and southern hemispheres

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Hemispheres

Northern

Hemisphere

Southern

Hemisphere

Equator

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Hemispheres and the Equator

  • Depending on our relative location to the equator, our seasonal temperatures and climate take on different patterns.
  • Countries and cities located closer to the equator have less climatic fluctuations

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Hemispheres and the Equator

  • Countries and cities located closer to the equator have less climatic fluctuations
    • This is because these locations are closer to the centre of the earth (the equator) and are therefore consistently receiving more direct rays from the sun
    • This differs from countries and cities that are located closer to the north and south poles in that those places will inevitably have times in the year when they are farther away from the sun

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Rotations

  • Remember that it takes the earth about 365 days to fully orbit the sun.
  • At the same time the earth is rotating about its own axis at a rate of 24 hours to make one full rotation.

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Seasons

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Seasons – Near the Poles (Hemispheres)

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9.4units

The sun rays must travel farther to reach the same point in the winter compared to the summer.

Winter in the �Northern Hemisphere

Summer in the �Northern Hemisphere

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Seasons – On the Equator

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the centre areas of the earth experience a much less drastic distance change from the sun throughout the year.

Winter on the �Equator

Summer on the �Equator

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Why Do We Have Seasons?

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Equinox

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