Hello!
Another property of sports drinks you can test with a simple test strip is pH level. For example, the more acidic a soda is, the higher amount of tooth decay it will cause. This can also be related to the color of the soda or drink. The same generally holds true for sports drinks as different brands and types do have varying pH levels. Test strips for pH can be purchased online or at a local drugstore.
As a fellow expert suggested, testing for electrolytes is another simple test you can perform. One electrolyte you can test for is salt (and do some background research about the negative heath effects of consuming too much salt). Salt content is usually labeled on packaging, but performing your own tests for accuracy would be a good idea for your project.
You can also test for the amount of sugar in these drinks and again look into the negative health affects of consuming large amounts of sugar. Here's an example procedure of how you could perform this test:
https://www.livestrong.com/article/4120 ... ned-drink/
Lastly, as a more advanced element of your project should you want to take an extra step is that could calculate the percentage of calories that come from sugar in each of the drinks to determine which drink is "healthier," or has a lower percentage of sugar. To do this, remember that each gram of sugar is 4 calories, so first you must multiply the number of grams of sugar in the drink by 4. Then, subtract the number of calories of sugar from the total number of calories in the drink. Divide the difference by the total number of calories in the drink to get a decimal, and multiply this by 100 to find the percent. This is a math concept your daughter may not have learned in school yet, and is just a suggestion.
Hope this helps and feel free to reach out with more questions!
-cnoonan180