Discussion:
• Defines and explains a closed system and provides an example.
• Defines and explains an open system and provides an example.
• Explains the inner and outer flows of a closed system.
• Explains the inner and outer flows of an open system.
• Defines and explains leakages in an open system.
• Defines and explains injections in an open system.
• Provides a personal example of a leakage, describes it and explains it.
• Provides a personal example of an injection, describes it and explains it.