Earth Day Word Search Puzzle. Fun Earth Day Activity. Earth Day Word Search has 19 vocabulary words, including earth, April, conservation, biodegradable, ecology, environment, reduce, reuse, and recycle, and more. A fun spring vocabulary activity and a useful time filler for use after state testing. Includes a word definitions study guide sheet and a key, which can be used as a vocabulary reference sheet. Digital and Print: I have also made an Easel Activity ready to go for in person or distanc