*Question*
Q: In plants, a high concentration of iaa inhibits what? Choices: - Cell reproduction - same elongation - technology elongation - cell elongation A:
**Answer**
cell elongation

*Question*
Q: Condensation, melting, deposition, sublimation, vaporization, and freezing are all considered changes in what? Choices: - density - altitude - speed - state A:
**Answer**
state

*Question*
Q: The decay rate is measured in a unit called the what? Choices: - decay rate - exponential decay - radioactive decay - half-life A:
**Answer**
half-life

*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