theories-explain, organize, predict hypotheses-testable prediction operational definition-clear procedures used to define and measure research variables replication is important because it helps us reassure ourselves that our outcome was correct and to see if we must change our hypotheses or correct something in our experiment
Explanation:

<em><u>Bitcoin is a digital currency which operates free of any central control or the oversight of banks or governments. Instead it relies on peer-to-peer software and cryptography. A public ledger records all bitcoin transactions and copies are held on servers around the world</u></em>
If caretakers are overwhelmed by caring for a person with disabilities they may maltreat them, their behavior is explained by: <span>Dependency -stress model</span><span>
Dependency -stress model is a concept that conveys that someone will fell an immense amount of stress of frustration if another person depend on them too much because it make them feel that they cannot live their own life
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Rome, America, Victoria, Monday, April (all proper nouns)