Why a “control” is important in a case-control study of a disease?

Can smoke be transformed into liquid or used as energy or both?

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?