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How has seasonal change made life possible on earth

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The sun: provides heat and light needed to support life.

Magnetic field: deflects the solar wind.

Ozone layer: Acts as a barrier against ultraviolet light and other radiation.

Greenhouse gases such as methane and carbon dioxide: retain warmth within the Earth.

Oxygen and carbon dioxide: oxygen is needed for aerobic respiration.
carbon dioxide is needed by photosynthesising organisms.

Liquid water: has many useful properties such as good solubility properties.

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