The Experiment Measuring the Earth Project - General Procedure Preparation To do this experiment you will need some materials to measure shadows accurately. For your measurements to be accurate, it is critical that the meter stick be vertical.
Wind can be a major factor.
Just ask Kathleen Smith . It is helpful to have a piece of paper to note where the the end of the shadow is. Also a compass will come in handy to determine in which direction the shadow falls. Have your class work in groups of 3 or 4. Set up your measurement station.