Is this right. Plz help

heat and pressure change rocks from one type to another

Explanation:

In the small paragraph, there is the phrase "believe". That means it's only a thought/belief and has not been proven yet. "Scientists believe . . ." and that's when you know it: the hypothesis--their guess.

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Explanation:

This is because after this sentence it says that they are going to do an experiment on it to see if its true. That means that this is the hypothesis.

c hope this you