Question

choose the correct answer. why are closed systems considered theoretical models? closed systems dont exchange anything with their surroundings and rarely occur. they are very common to see in nature and most ecosystems are examples. they are systems that are not fully understood by environmental scientists.

Explanation:

Closed - systems are theoretical as they don't exchange matter with their surroundings and are rare in reality. In nature, systems often have some level of matter exchange.

Answer:

Closed systems don't exchange anything with their surroundings and rarely occur.