4. Understand that the Sun should never be viewed directly, nor by use of simple telescopes or filters, and that safe viewing requires appropriate methods and safety precautions.
VIEWING THE SUN
Never ever observe the sun with your naked eye, it may lead to permanent eye damage!
You must wear polarized sunglasses that block out harmful rays that may burn out your retina.
THE SUN
The apparent movement of the sun across the sky causes the shadow of the stick to move.
As the sun moves from East to West, the shadow moves from West to East.
When the sun is LOW in the sky, the shadows are LONG. Alternately, when the sun is high in the sky, the shadows are short.
If the person who shot the video above to the left did the same experiment in the winter, the shadows would be LONGER because the sun is LOWER in the sky than it is in summer.
Now, go forth, and share the news of what you have learned!