Describe each type of matter as a pure substance (element), pure substance (compound), or mixture

In 2002, the rare earth elements mine in mountain pass, california was closed because

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?

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy