(Question)
Q: Organic substances, including proteins, carbohydrates, and oils, contain what element? Choices: - oxygen - acid - iron - carbon A:
(Answer)
carbon

(Question)
Q: What can damage the hair cells lining the cochlea of the inner ear? Choices: - amelodic sounds - unexpected sounds - wavering sounds - loud sounds A:
(Answer)
loud sounds

(Question)
Q: Ionic compounds take on the form of extended three-dimensional arrays of cations and what else? Choices: - oxides - electrons - crystals - anions A:
(Answer)
anions