In Free Earth Day 21 Vocabulary Word Search and Key Worksheet No Prep, learners are motivated to find science words. Penny Inman (TpT Seller) said, "Great little filler activity for my students who love word searches. Helps with tracking and vocabulary and spelling." Happy Earth Day!Earth Day vocabulary words include altitude, botanical, continent, dam,ecology, fertile, groundwater, hydrology, irrigation, litter, methane, nature, ozone, prehistoric, quake, recycle, sustainable, temperature, ultr