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October 23, 2020
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Naquiah
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Observing the shadow when an object block light source
A shadow is created when an object blocks light from a light source. Shadow created by the sun change shape and length throughout the day as the Earth rotates on an axis, the relative position of the sun changes in the sky. The size and direction of the shadow created by the sun will also change...

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«Turquoise flower»

«Turquoise flower»Medal «Turquoise flower». Awarded for the first publication.
October 23, 2020