(Question)
Q: What quality of sound makes a tuba and a piccolo very different to a listener? Choices: - wavelength - tune - curve - pitch A:
(Answer)
pitch

(Question)
Q: In the universe as a whole, what is the most common element? Choices: - helium - carbon - oxygen - hydrogen A:
(Answer)
hydrogen

(Question)
Q: Newton realized that the nature of gravity on earth that pulls an apple to the ground could explain the motion of these? Choices: - seasons - atoms and quarks - molecules - moon and planets A:
(Answer)
moon and planets