The question you will answer in this FACTivity is: How much precipitation falls over a month’s time at my school or where I live? Materials: 5 rain gauges or materials to make rain gauges Paper for logbook or science notebook Rain Gauge Materials: Five 2-liter plastic bottles Tool to cut off the tops of plastic bottles Duct tape Ruler Permanent marker Stones/pebbles Water Topics: Water, Climate, Group Activity, Precipitation, Rain Gauge.