Which term defines a well tested scientifically supported statement that explains how something works

The term is Hypothesis.

Explanation:

An Hypothesis, is a well posed statement maked by a researcher. It is based on an observation that explains something about  a process or a system and are tested trough experimentation. After that, and based on the results of experimentation, the researcher can makes conclusion

i'd say that the moon rock is about 2.2 billion years old.

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

can i get the brainliest pls

explanation: