Winter is the perfect time for an easy snow science experiment!
My family will tell you that I'm an amateur weather buff -- I like to observe what Mother Nature dishes out to us :)
While watching the Weather Channel one morning, the forecaster was talking about the rain/snow ratio -- basically 1 inch of rain would be equivalent to 13 inches of snow.
So I thought it would be interesting to test this during our next snow.
We only had to wait a week for Mother Nature to cooperate and send us a few inches of good snow! Which I know is not the case elsewhere this year (apologies to our friends up North & back East who could probably fill up their bathtubs with it by now!).
How Much Water is in Snow? Winter Science Experiment
This is such a quick & easy science experiment that kids from preschool to high school will really enjoy -- only 2 minutes to set-up and some GREAT results! I'm including detailed directions so you can replicate this at home or in a classroom along with affiliate links to items that we used during our experiment.
All you'll need for this experiment is:
- a jar that you can fill with snow (we like to use mason jars for experiments like these because they are easy to see through)
- dry erase markers
- a ruler - we have this cool flexible/bendable ruler that we use with our nature experiments
- a sheet of paper/pencil and
- a clock
If you're looking for a good book to go with this experiment (we always recommend connecting science & reading!), try one of these great non-fiction books:
Curious About Snow (Smithsonian) -- a great book about all things snow! Kids will enjoy learning about crystalization, the types of snowflakes that form, the science behind snow and more!
The Story of Snow: The Science of Winter's Wonder -- this nonfiction book reads more like a story which is perfect for younger kids. Illustrations show the process of water varpor becoming snow crystals and the book includes details about how to catch & observe your own snowflakes too!
The Snowflake: A Water Cycle Story -- is also a wonderful book if your kids are learning about the the water cycle. The author follows the journey of a single water drop throughout the year showing how it may become part of a cloud, flow into the ocean or turn into a snow crystal.
First, head outside and fill the jar with snow. Be sure to pack it down some so you have a nice solid amount.
Bring the jar back inside and mark your snow line using the dry erase marker.
This may be difficult as your glass jar will be super cold & wet so the marker may not work right away. If you have a problem with the marker not writing, try adding a rubber band around the jar to mark your start line.
Then use the ruler to measure the height of the snow in your jar.
We measured 4.25 inches of snow in our jar.
Write down the time on a sticky note or piece of paper (we started our experiment at 2:30 pm).
Now ask your kids two questions:
1. When the snow completely melts, how much water do you think will be left in the jar?
Use the dry erase marker to mark their estimation or 'guess' line (we used a "G" to mark ours).
You can explain to your kids that an estimation is an educated guess based on what you know about the experiment (in this case, we knew the snow would melt because we brought it inside where the temperature was warmer than 32 degrees).
2. How long do you think it will take all the snow to melt?
Write their estimation on the piece of paper. Our 'guess' was that it would take an hour to melt.
For more details on science & estimations, see this Sink & Float Experiment with free printable.
Now go off and do something fun!
Because it's going to take a while for the snow to melt :)
You might want to take a peek at these 33 Fun Indoor & Outdoor Winter Activities while you wait.
This is what our jar looked like after 1 hour.
At first, we weren't sure the experiment was going to work.
We just saw the snow getting lower but didn't see any water forming in the jar. In hindsight, I should have known that some of the snow would evaporate early on instead of just melting -- another great lesson for kids!
There are multiple things that water can do in the water cycle -- evaporate, condense, melt, etc. If you want to tie this to the various parts of the water cycle, be sure to see the LEGO Water Cycle science project to learn more.
As you can see, we were a bit off with our estimation of how long it would take the snow to melt.
That jar stayed cold for a long time and the packed snow retained it's low temperature until there was enough air surrounding the snow block to melt it from multiple sides.
When it FINALLY all melted, our jar looked like this.
A far cry from the original 4.25 inches of snow!
So, how long did it take for the snow to melt?
Drum roll please .....
Yep, 3 hours before we had a jar of water.
As my daughter said, it took a loooonng time :)
We used a ruler to measure our results as we were trying to see if we would have the same ratio as the weather forecasters but I'm not sure how they measured their snow melt.
So for us, 4.25 inches of snow melted to 1 inch of water.
Ideally, I think you would want to measure snow and water as volume but that's harder to do with snow unless you have a really good size measuring cup.
Science Experiments Repeated
And just for good measure, we repeated the experiment with a second jar of snow.
This is a great experiment to discuss the idea of how scientists work to replicate their results by running the same experiment more than once.
By replicating the experiment (doing it again under the same conditions), you have more evidence that your observations and results can be reproduced by others and not just a fluke.
You should really replicate an experiment at least 3 times -- but remember how long I told you it took the snow to melt? Well, we were getting close to bedtime by the time the second jar got there ;)
Here are the two jars side by side -- the results were very similar with almost the same amount of water in the end.
We were certainly surprised with the results!
The snow they collected produced more water than our snow did which is really interesting and probably has to do with both the temperature and moisture in the air when the snow falls. It could also have to do with the humidity level in your house when the snow is melting (more humid air would probably account for less evaporation of the snow early on since moist air is more saturated with water vapor molecules than dry air).
Let us know if you try the experiment -- what was your ratio of snow to water?
Take a picture and post it to our Facebook page -- we'd love to see your results!
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