Hypothesis
Hypothesize that the Sun reaches its zenith during the day at the time that is equally between sunrise and sunset.
Materials List
1×1 square piece of plywood
Large protractor
Pencil
Carpenter's level
Modeling clay
Sunny day
Time of sunrise and sunset for that day (available from a daily newspaper, the Farmers' Almanac, your local radio station, or a National Oceanic and Atmospheric Administration (NOAA) weather radio)
Possible adult supervision needed