how to build a pluviometer

ingredients
a plastic bottle (make sure the bottle has equal bottom and middle)
a ruler
a permanent marker
a funnel
masking tape (the one used to wrap pipes)
a pipette

instructions

1.measure one centimeter of water using the pipette and pour it into the bottle.
2.mark the bottle where the surface of the water gets.
3.repeat the this operation five times.
4.measure the distance between each mark.
5.make marks using the distances you measured before.
6.cut the border of the funnel so it equals the bottom of the bottle
7.stick the narrow part of the funnel into the bottle and secure it using the masking tape
8.place the pluviometer in the middle of the yard