1. This small group activity is designed to give students practice with identifying what is part of a system and what is part of the system's surroundings.
  2. Students use what they know to classify each part of the previous experiment as either a part of the system or of the system's surroundings.
  3. The whole class discussion focuses on ensuring that students understand how to determine whether something is part of a system or of the system's surroundings.

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