*Question*
Q: What was the first mass extinction that occurred on earth? Choices: - late Devonian mass extinction - paleozoic mass extinction - proterozoic mass extinction - precambrian mass extinction A:
**Answer**
precambrian mass extinction

*Question*
Q: What is another name for molecular compounds? Choices: - phenotype compounds - oxidized compounds - synthetic compounds - covalent compounds A:
**Answer**
covalent compounds

*Question*
Q: What fatty material inside arteries can restrict blood flow in the artery? Choices: - marble - collagen - cholesterol - plaque A:
**Answer**
plaque

*Question*
Q: For a given amount of solute, do smaller particles have a greater or lesser surface area? Choices: - lesser - equal - neither - greater A:
**Answer**
greater