Q: As a diver descends, the increase in pressure causes the body's air pockets in the ears and lungs to do what? Choices: - heat up - expand - blow up - compress A:
compress

Q: What is the preferred method for separating late transition metals from their ores? Choices: - hydraulics - purging - heating - hydrometallurgy A:
hydrometallurgy

Q: Q: Liquid water changing to water vapor is called? Choices: - oxidation - respiration - transpiration - evaporation A:
A: evaporation

Question: Q: In combination or synthesis reactions, two chemical species combine to produce a what? Choices: - fusion - mixture - alloy - new compound A:
Answer: new compound

*Question*
Q: The only obvious difference between boys and girls at birth is what type of organs? Choices: - digestive - respiratory - nervous - reproductive A:
**Answer**
reproductive

Q: Q: Ion pumps, the biological machines responsible for the selective transport of metal ions, are complex assemblies of what? Choices: - cells - minerals - acids - proteins A:
A: proteins