*Question*
Answer the following question given this paragraph: The rate of decay of a radioactive substance is constant over time. Q: What remains a constant of radioactive substance over time? Choices: - temperature - volatility - acidity - rate of decay A:
**Answer**
rate of decay

*Question*
Answer the following question given this paragraph: The winds of a tornado can reach very high speeds. The faster the winds blow, the greater the damage they cause. Wind speed and damage are used to classify tornadoes ( Table below ). Q: How do they classify tornadoes? Choices: - wind density - amount of destruction - wind temperature - wind speed A:
**Answer**
wind speed

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

*Question*
Answer the following question given this paragraph: Oxidation can be defined as the addition of oxygen to a molecule or the removal of hydrogen from a molecule. When an alkane is heated in the presence of an appropriate catalyst, it can be oxidized to the corresponding alkene in a reaction called a dehydrogenation reaction. Two hydrogen atoms are removed in the process. The alkene can be further oxidized to an alkyne by the removal of two more hydrogen atoms. 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