*Question*
Q: What do you call sound that has a wave frequency higher than the human ear can detect? Choices: - dynamic sound - supersonic sound - hypersonic sound - ultrasound A:
**Answer**
ultrasound

*Question*
Q: What is the process in which a solid changes directly to a gas without going through the liquid state called? Choices: - vaporization - amplification - Diffusion - sublimation A:
**Answer**
sublimation

*Question*
Q: The earliest cells were called what? Choices: - eukaryotes - carbohydrates - microcytes - prokaryotes A:
**Answer**
prokaryotes

*Question*
Q: Increasing the pressure on a gas has what effect on its solubility? Choices: - decrease - halt - slow - increase A:
**Answer**
increase