Which of these igneous rocks cooled so quickly that crystals did not form, creating a natural glassy look?

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.

What noticeable trend from this graph might be used to make a conclusion?

In each transformation of energy , some energy what?