Great activity for any science class but especially designed for a chemistry class.
Great assessment over terminology. Students enjoy quiz-quiz-trade and forget that they are learning vocabulary as they mingle with their classmates.
Directions are given in the activity. The teacher can play music to start the activity and when the music stops the activity stops. This allows the teacher to control the amount of time spent. It may take 5- 15 minutes depending on the teacher. Some teachers would use this activity everyday they are on the unit to just drill the vocabulary and allow the students to move.