| A | B |
|---|
| infrasonic | having a sound so low that people cannot hear it |
| conversations | exchanges of observations, opinions, or ideas |
| melody | a series of musical notes |
| choruses | parts of a song that are repeated after each verse |
| vibrations | slight, rapid movements |
| displayed | shown |
| infomercials | extra long television commercials |
| effective | able to get results |
| convincing | making someone believe something they didn't believe earlier |
| parchment | animal skin, usually from sheep or goats, that is used to make tough translucent paper for writing |
| quill | a hollow wing or tail feather used for writing |
| scribes | people who copy manuscripts or books by hand |
| persuade | talk into believing or doing something |
| manuscripts | books or papers written by hand |
| tinkered | worked in a clumsy or unskilled way |
