Things are Heating Up!

A big part of "WEATHER" is the temperature, and so, our little voyagers are learning to read a thermometer and record their findings. They are trying to do it everyday, morning and afternoon, and, have been mostly successful.

This was project #2 for the DIY Meteorologist badge:

To spark interest, and introduce the "temperature" concept, we started off with our own version of  this (DIY recommended) thermometer project from Instructables:

We didn't have any film cannisters, but these protein scoopers were a similar size, and we had some Zero Water lids that were a tight fight, so... this is what we used:

Materials Needed:

small plastic containers with tight fitting lids

thin straws (we used the stir straws for coffee)

food color

modeling clay or hot glue gun for sealing

water

First, drill a hole in the center of lid. This is where you will stick the straw.

Now, insert the straw...

See - Like this!

Next, add water...

Add food color...

And more water -- We added a little water, the dye, then more water, 

so we wouldn't have to stir it.

Put the lid on -- Make sure the straw is way down in the container, but not touching the bottom. Then use the modeling clay or hot glue to create a good seal around the straw.

We first tried using our hands to warm the "thermometers," but that didn't do anything! We tried cold water -- uneventful. But the hot water worked! Especially in the case of Spiderman's blue thermometer! 

His worked the best out of the three --maybe because he just had to add "a little extra" dye, which made the rising water easier  to see in the straw. He also pushed his straw down in a little further than the girls, and that might have helped, too! So much for following the adult's directions, and good thing he didn't, or we would have been sorely disappointed.

Although this was a fun project, if I were to do it again, I would probably try a different homemade thermometer. This one from EnergyQuest is VERY similar, but looks like it would have more potential for success:

I think using a bigger bottle would make it easier to see the temperature change. Has anyone made this type of thermometer before? How did it work?