This hands on activity will get your students up and out of their seat! Print out the cards on card stock, cut out each domino and laminate if possible. The Earth Day vocabulary included are: biodegradable, natural resources, fossil fuel, pollutant, recycling, compost, hazardous waste, consumption, conserve, ecological footprint, nonrenewable energy, ecosystem, global warming, renewable energy, ecology. Students mix up the cards and match the word to the correct definition. Start with "Earth Day Start" and watch the kids have a ball!