A system is defined as a group of parts that work together. An open system allows matter to flow freely in and out, while a closed system only allows light and air to escape. The document asks the reader to imagine what they would need to do to survive if their home became a closed system for a month, where they could not leave and would need to plan for food, water, and waste management without access to typical sources.

1. Open Vs. Closed Systems

2. New Vocabulary
• A System is defined as a group of parts that
work together
• Open System- A system where matter flows
freely
• Closed System- A system where the only
things that can escape are Light and Air.

3. Your
House is
an Open
System!

4. What if it became a closed system?
How would you plan for survival if your home became a
closed system for a month? Remember, you can’t leave.
– What will you eat?
– Where will you get water? (no faucets!)
– How will you deal with waste?
Brainstorm!

5. Be careful…
• Closed systems are closer than they appear.