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

Explanation:A closed system is system in which neither matter nor energy cannot cross the boundaries of the system.So the statement 3 which is the amount of matter remains same in the system is correct one on the bases of the law of conservation of mass.This law states that neither mass and energy can be created nor destroyed but they can change from one form to another form.In the given system, reaction of matter is in cyclic form, the starting and stopping points of reaction can be well defined on the basis of reaction.

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )