Q: Radiometric dating methods, such as carbon-14 dating depend on what type of decay? Choices: - microwave - carbon - nuclear - radioactive A:
radioactive

Q: When it was found that, without the force of gravity exerting pressure on the bones, bone mass was lost in astronauts, what kind of exercise provided an antidote? Choices: - aerobic - anaerobic - sedentary - resistive A:
resistive

Q: Q: What is one problem with current methods of aluminum production? Choices: - food shortages - competition - recycling is cheap - environmental contaminants A:
A: environmental contaminants

Question: Q: What occurs when there is a sudden discharge of static electricity between a cloud and the ground? Choices: - updraft - wind - rain - lightning A:
Answer: lightning

*Question*
Q: Chemical equations in which heat is shown as either a reactant or a product are called what? Choices: - hydroelectric equations - thorium equations - feedstock equations - thermochemical equations A:
**Answer**
thermochemical equations

Q: Q: Free-flowing electrons enable what materials to conduct electricity and heat very well? Choices: - noble gases - alloys - acids - metals A:
A: metals