2. How does temperature describe motion?

As the temperature increases, the kinetic energy of the molecules of the liquid increases. The movement of the molecules gradually overcomes forces of attraction between the molecules, with the result that they have greater freedom to move, over greater volumes.

Explanation:

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Stomach acid activates the pepsin that digests protein into smaller proteins. Proteins are long chains of amino acids that are essential for cell growth and repair. Next, from the stomach the food moves into the small intestine where it continues to be digested by enzymes produced in the pancreas.