Long before the invention of clock and watches, people use the Sun to tell time. This is done by sticking a long stick on the ground and read the time of the day from the shadow the stick cast. This experiment will show how the Sun relates to time.Materials:
1. A lump of play-dough
2. Stick
3. Rocks
4. Watch or clock
Instruction:
1. Start the experiment sometime in the morning.
2. Find a sunny spot at the lawn or driveway.
3. Put the stick in the ground or if on a hard ground, use the play-dough as a base to hold the stick upright.
4. Place the rock for each hour indicating where the shadow falls at that time.
Explanation:
As the Earth spins during the day, the Sun appears to move in the sky from east to west. The Sun is highest in the sky at midday and casts a short shadow. In the afternoon, when the Sun is lower in the sky, the shadow is longer.
