Is a waterfall matter or energy? What about microwaves or a plastic bag? This simple, engaging sorting activity introduces lower elementary children to one of the foundational concepts of physics — the difference between matter and energy. What's included:2 category header cards: Matter and Energy, each with a clear definition20 word cards to sort across both categoriesControl chart for independent self-correctionPDF format, print and cutHow to use: Children cut and sort the word cards under the