¿CUÁL ES LA FRASE CORRECTA? 1. las sustancias puras son compuestos químicos.
2. las sustancias simples son sustancias puras.
3. una disolución es una mezcla heterogénea de dos componentes: el disolvente y el soluto.
4. los coloides son mezclas homogéneas de aspecto heterogéneo.

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?