*Question*
Q: What helps pumice float in water? Choices: - high density - large mass - gravity - gas bubble holes A:
**Answer**
gas bubble holes

*Question*
Q: What is measured using units pascal, bar, atmosphere or mmhg? Choices: - fuel - Muscle - push - pressure A:
**Answer**
pressure

*Question*
Q: What type of relationship is it when one variable increases the other variable decreases? Choices: - divergence - curve - regression - inverse A:
**Answer**
inverse

*Question*
Q: What system is the spinal cord related to? Choices: - circulatory system - lymphatic system - digestive system - nervous system A:
**Answer**
nervous system