Q: Enthalpy is a measure of the total energy of what kind of system? A:
OPTIONS:
- macroscopic
- planetary
- hypodermic
- thermodynamic

Answer: thermodynamic

Q: Which veins return oxygen-rich blood from the lungs to the heart? A:
OPTIONS:
- jugular
- varicose
- respiratory
- pulmonary

Answer: pulmonary

Q: The properties of the alkali metals are similar to each other as expected for elements in the same what? A:
OPTIONS:
- class
- branch
- farm
- family

Answer:
family