Which two generalizations can be made based on what you know about cycles of matter in a closed system? 1 new matter is added, and old matter is destroyed. 2 matter changes its physical form, allowing it to return to its original state. 3 the amount of matter within the system remains the same. 4 matter and energy can cross the boundaries of the system. 5 the cycle has a well-defined starting and stopping point.

The correct answer is option 3) The amount of matter within the system remains the same and 5) The cycle has a well-defined starting and stopping point.

A closed system can be defined as a system in which there is the only exchange of energy with the surrounding, while no exchange of matter takes place.  

In a closed system, the cycle has a well-defined starting and stopping point.

Therefore, the two generalizations which can be made for cycles of matter in a closed system are option 1) and 5)

The statements 3 and 5 can be two generalization made by the information of a closed system.

they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

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