*Question*
Q: In contrast to metals, electrical insulators are materials that conduct electricity poorly because their valence bands are what? Choices: - empty - large - half-full - full A:
**Answer**
full

*Question*
Q: What is a process in which some substances change into different substances? Choices: - a toxic reaction - a bio reaction - a thermodynamic reaction - a chemical reaction A:
**Answer**
a chemical reaction

*Question*
Q: What does burning wood release into the atmosphere? Choices: - oxygen - helium - hydrogen chloride - carbon dioxide A:
**Answer**
carbon dioxide

*Question*
Q: What is used during filtration to push fluids and solutes, from higher pressure areas to lower pressure areas? Choices: - constructs pressure gradient - limited pressure gradient - magnesium pressure gradient - hydrostatic pressure gradient A:
**Answer**
hydrostatic pressure gradient