Question

Among the different types of scientific knowledge ______ are likely to be modified or discarded most frequently. Long ago, in the 1600s, scientists discarded the phlogiston theory because ______________.
line 1. Hypotheses, laws, theories
line 2. Scientists wanted to explain things differently, new evidence didn’t support it, it was too old and needed to be replaced

Answer 1

During a scientific study a hypotheses is generally modified or discarded

so for first blank the answer is hypotheses

Now in case of phlogiston theory it was assumed that when a substance catches fire it evolve certain substances known as phlogiston which was later on discarded as there is no such particle. Infact a substane undergoing oxidation may gain weight

Hence in second blank the answer is new evidence didn’t support it,