This is a great Earth Day activity or any day activity, bell ringer, substitute worksheet, group work, group discussion. This activity gives students the Latin root word of earth and then has the students discuss and define the derivatives. This is appropriate work for middle school English or science, high school English, Latin, or Science class (if your administration is promoting a cross subject approach to learning). This activity can be a short overview or a long discussion depending on how you want to use it. Instructions are included.