Read the story and answer the questions to test your comprehension.
A bass guitar looks very different from an upright bass. First of all, it's about a quarter of the size and completely electric. The two instruments have their low, vibrating tones in common, though, and four thick, large strings. Since the 1950's, when electric instruments became more popular, the bass has replaced the upright bass in most contemporary music, with the exception of classical music and the orchestra.