KENNY: Check this out. Do you see how the red water floats to the top of the clear water? Why do you think that is? There's nothing in the water but food coloring. But the red water and the clear water are different in another way. Do you know how they're different?
Well, since you can't feel the water, I'm going to tell you. The red water is warm and the clear water is cold. And warm water floats on top of cold water. Brandi M. of Mansfield, Texas, sent us this phenom. Here's a way you can test it out for yourself.
Okay, first, you want to take a bottle and fill it with cold water. Then, you want to take another bottle and fill it with very warm water and add some food coloring. Now you want to take an index card and put it on top of the bottle with cold water. Okay.
Then, slowly flip over the cold water bottle while holding the index card in place and put it on top of the warm water bottle. Now, carefully... carefully remove the index card so that the spouts are aligned. And...watch in amazement.
See, it's starting to go up. The reason that warm water floats and cold water sinks is because that warm water is less dense than cold water. Density is something that makes things float so warm water can actually float on cold water.
To test it out, I'm going to try this with cold clear water and cold red water instead of warm red water. So, they're both cold. See? The colors mixed less.
So now I know that the red water floated to the top of the clear water because it was warmer and not because it was colored red. Try this at home with two bottles of warm water. Do you think they'll mix the same way? Test it out.
Academic standards correlations on Teachers' Domain use the Achievement Standards Network (ASN) database of state and national standards, provided to NSDL projects courtesy of JES & Co.
We assign reference terms to each statement within a standards document and to each media resource, and correlations are based upon matches of these terms for a given grade band. If a particular standards document of interest to you is not displayed yet, it most likely has not yet been processed by ASN or by Teachers' Domain. We will be adding social studies and arts correlations over the coming year, and also will be increasing the specificity of alignment.