If you are lucky enough to have some snow, this is a simple experiment you can use to learn about sunlight and energy. It fits nicely into discussions of solar energy and how energy changes from one form to another.
If you look at the label of any food, you will probably find that it lists the Calorie content. Calories tell us how much energy you will get by consuming the food. How do scientists measure that energy?
In looking at the food web, we are trying to see how energy is transferred from one living thing to another. As part of that study, we need to be able to measure that energy. Luckily that involves something that you are probably very familiar with.