Julian is late to class and sees a list on the board:

-are explanations of observations and hypotheses
-are based on many experiments
-have been revised over time
-can be used to predict what may be expected in the future

what is julian’s class discussing?

scientific inquiries
theories
scientific questions
laws

The correct is option theories.

The theories are the explanation of the phenomenon or the hypothesis. The theory explains cause and the working of  nay phenomenon. The theories are established on the basis of the experiments, which reproducible and replicatable. according to the advancements and new discoveries, the theories can change over time, once, the theory is established it can help to  predict the outcomes of the futures.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.