Question: Q: The lungs, kidneys, skin, and large intestine are all part of what organ system? Choices: - sensory - digestive - respiratory - excretory A:
Answer: excretory

Question: Q: An ether is an organic compound in which two hydrocarbon groups are bonded to the same atom of what? Choices: - hydrogen - sulfur - nitrogen - oxygen A:
Answer: oxygen

Question: Q: Saturn is made mostly of helium and what else? Choices: - nitrogen - carbon - hydrogen - hydrogen A:
Answer:
hydrogen