The earliest phase of puberty, which begins before any outward physical changes, is known as

A sound mixer is impressed by the new

equipment that was just installed in his recording studio. He says that now he will be able to help singers and musicians produce better CDs because he can eliminate unneeded and undesired wavelengths. What term describes the characteristic of sound waves that the sound mixer is now able to alter? a) volleying b) amplitude c) frequency d) saturation

Lucas is in first grade and works hard to print his alphabet letters on the lines on his notebook paper. In which direction is this motor development proceeding??

a. ?from toe to head b. ?from his waist to his head and feet at the same time c. ?from his fingers to his hands and from his toes to his feet d. ?from his midline to his extremities