Make a DIY Rain Gauge: An Easy Science Activity
Rain Gauge
This week we have been incorporating a rain theme into our science, literature, art, music, and math study. (Check out the rain splatter painting, rain stick, and the umbrella paper plate craft that we did!) One easy science activity to investigate rain is by making a rain gauge. A rain gauge is an instrument used to
measure how much rain (measured in units of height) falls in a given
time. You can make one to use with your child easily and without
much expense.
I actually bought the soda expressly
for the purpose of doing this activity. While shopping, I noticed
that certain brands have a bottle shape that curves in at the middle.
You will need to select a bottle that has straight sides in order to
get an accurate reading.
You will need:
- an empty soda bottle
- duct tape
- scissors
- ruler
- permanent marker
- small stones
- water
Making the DIY Rain Gauge:
The night before, I prepared the rain
gauge by cutting the top off the bottle where it begins to curve in.
Then I used the duct tape to cover up the edges, so that no one would
get snagged. Mark the lowest part of the bottle where the sides are
straight with a little tick mark. This is your gauge's zero. Line
up the ruler with your tick mark. Mark off ticks at even intervals
(I used the half inch). Write the inch numbers next to the tick
marks. We only used inches because I am just starting to introduce
the concept of measurement, however you could mark one side in inches
and another side in centimeters so that the child can compare
measurement systems.
Explain to your child that you will be
making a rain gauge and what that is. Show your child the bottle and
explain the significance of the tick marks. I asked her to identify
the numbers. Then, I put the ruler side by side with the tick marks.
I explained that we would use the gauge to measure how much rain
fell each day.
Ask your child to fill the bottom of
the bottle with the rocks, but don't fill it past the zero line.
Then, have them pour some water right up to the line. You can place
the top of the bottle, inverted, into the base. This will help
prevent evaporation from skewing your results. Push the top in until
it is snug, but do not tape it. You will need to be able to remove
the top to drain the instrument back to the zero line.
When we checked on the rain gauge
halfway through the first day (it hadn't rained yet) we could see
little drops of condensation forming on the top of the device. You
could use this as an opportunity to explain the concept behind clouds
and precipitation.
We checked every day for a week. The
only rain we received was less than half an inch, but still Little M.
was very excited to see that the level was above zero.

If you enjoyed this science activity or found
it useful, please share or leave a comment. I always love to hear
from you!
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