*Question*
Q: What remains a constant of radioactive substance over time? Choices: - temperature - volatility - acidity - rate of decay A:
**Answer**
rate of decay

*Question*
Q: How do they classify tornadoes? Choices: - wind density - amount of destruction - wind temperature - wind speed A:
**Answer**
wind speed

*Question*
Q: How is the chance of survival affected when animals lack parental care? Choices: - variable - unaffected - increased - decreased A:
**Answer**
decreased

*Question*
Q: What is the addition of oxygen to a molecule or the removal of hydrogen from a molecule called? Choices: - precipitation - evaporation - ionization - oxidation A:
**Answer**
oxidation