A. gases only B. solids only
C. liquids only D. Solids, liquids and gases.
A. Baby girl B. Baby boy C. A man D. A woman
A. Sound producing organ B. Skeletal system
C. Hearing organ D. Reproductive organ
A. 20 Hz to 20,000 Hz. B. Less than 20 Hz.
C. More than 20,000 Hz. D. 20 Hz to 25,000 Hz.
A. Stomach B. Heart C. Larynx D. Mouth
A. Loud sound B. make sound
C. slow sound D. shreak
A. Frequency B. Amplitude
C. both of these D. None of these