In this Earth Day puzzle review worksheet, students will solve 37 problems that include questions from every unit of 8th-grade math. Students will practice solving equations, functions, systems of equations, Pythagorean theorem, volume, triangle angles, transformations, scatter plots, and many other important skills. This is a great review for a state end-of-the-year test or final exam. Students will need to decode the Earth Day puzzle. The puzzle is, "We have forgotten how to be good guests, ho