An education is usually thought to have intrinsic ___________ rather than extrinsic. That is, its worth comes from the love of knowledge rather than something monetary. However, with the rising cost of tuition, one could maybe argue that there is a fiscal price related to education Which choice completes the text with the most logical and precise word or phrase?

The night sky erupted with great displays of sound and light. Every couple of minutes, from dusk till late, the loud, explosive sounds would shake the sky and some unsuspecting and innocent below. It is not lightning or anything ___________; rather, it is meant to be a symbol of patriotism. It was a week before the Fourth of July, a day meant to celebrate the United States and those who defend it, and the fireworks had already begun. Which choice completes the text with the most logical and precise word or phrase?

Though Friedel and Crafts discovered a new chemical reaction, this reaction technique was virtually useless to the scientific community because it lacked selectivity. Selectivity causes a reaction to favor one product over another potential product of the reaction. Without selectivity, it is impossible for chemists to ___________ the products of their reaction. Not being able to separate one product from another makes a reaction useless because even a small alteration in a molecule can result in adverse effects. Which choice completes the text with the most logical and precise word or phrase?

As anyone who has watched a bag of instant popcorn expand knows, the tray inside of a microwave oven rotates as the food cooks. This rotation has the interesting effect of increasing the kinetic energy of the food’s polar molecules, as they too must constantly rotate to remain aligned with the field. As they do so, these molecules rub and grind against their neighbors, converting their kinetic energy into intermolecular friction, and thus evolving heat. In fact, the motion of molecules is so directly related to internal heat that one can calculate a material’s exact temperature by averaging the kinetic energy of the atoms and molecules that comprise it. As used in the text, what does the word “evolving” most nearly mean?