erik has a handful of whitish grey stone with nonmetallic luster that leaves a colorless streak they can be scratchd by a steel file but not by a knife what does he have

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

When an experimenter draws a conclusion that he assumes will apply to all situations set up similarly to his test situation, even though he cannot possibly have examined all possible test scenarios, the experimenter is using deductive reasoning inductive reasoning abductive reasoning subjective reasoning