Q: The entire volume of what is filtered through the kidneys about 300 times per day? Choices: - gastric juice - urine - saliva - blood A:
blood

Q: What does the placenta sustain during pregnancy? Choices: - the heart - the mother - the endocrine system - the fetus A:
the fetus

Q: What is the conversion of metals from their ores to more useful forms called? Choices: - thermodynamics - nanotechnology - crystallography - metallurgy A:
metallurgy

Q: The ancient greek philosopher aristotle thought that all matter consists of just four what, which he identified as earth, air, water, and fire? Choices: - ingredients - structures - compounds - elements A:
elements