6th graders quiz Quiz

Question Number 1 what is vibration? A. back and forth movement that causes sound B. sound C. talking D. singing Question Number 2 a whisper measures how many decibels? A. 45 B. 60 C. 15 D. 120 Question Number 3 the white part of the eye is called the? A. pupil B. iris C. sclera D. lens Question Number 4 the outer part of the ear you can see is called the? A. iris B. pinna C. semi-circular canals D. cochlea