PAE(03/19/25): Real-Life Close and Open Technology System

Which of the following best explains an open system?

• A system that does not exchange energy or matter with its surroundings

• A system that only receives inputs but does not produce outputs

• A system that exchanges energy, matter, or information with its environment

• A system that does not require external interaction

Why is a mobile phone considered an open system?

• It stores all energy internally

• It receives inputs and produces outputs that interact with the environment

• It does not require external power

• It operates without exchanging signals

Describe how a closed system functions.

• It continuously interacts with the environment

• It allows the flow of only information but not matter

• It is self-contained and does not exchange matter with its surroundings

• It requires external materials to function

Which of the following is an example of an open system?

• A home water heater

• A sealed thermos bottle

• A jet engine

• A battery

Why is a jet engine an open system?

• It does not use energy

• It takes in air, combusts fuel, and expels exhaust

• It stores heat without releasing it

• It operates in a vacuum

Explain why a car’s air conditioning system is a closed system.

• It continuously interacts with the environment

• It recirculates refrigerant within a sealed loop

• It takes in external air to function

• It burns fuel to produce cold air

Which of the following best describes a faucet?

• An open system because it takes in and releases water

• A closed system because it stores water

• A system that does not require external interaction

• A sealed system that recirculates water

Why does a manufacturing conveyor belt qualify as an open system?

• It cycles coolant within machinery

• It moves materials in and out of the factory process

• It remains in a sealed environment

• It does not interact with external objects

Explain how a sealed industrial cooling system functions.

• It releases coolant into the environment

• It continuously recycles coolant without external exchange

• It takes in materials and expels waste

• It does not use energy

Which of the following is NOT a characteristic of an open system?

• It exchanges energy with its surroundings

• It allows material to enter and exit

• It operates without external influence

• It interacts with its environment