The casual listener regards music mainly as a mood enhancer or as a pleasant part of the environment.

The term "in situ" refers to what:

a. can be seen with the aid a device b. made of man made products c. is in its original location d. changed color depending on the time of day

When and where were the earliest photographs developed?

a) in the nineteenth century in France and England b) in China, 2,000 years ago c) in twentieth-century America d) in fifteenth-century Italy