Q: How thick is the earth's continental crust, on average? Choices: - 60 kilometers - 15 kilometers - 25 kilometers - 35 kilometers A:
35 kilometers

Q: What is the term that refers to stored chemical energy in organic matter or wastes? Choices: - nuclear energy - potential energy - starch energy - biomass energy A:
biomass energy

Q: E. coli need what kind of acids to survive? Choices: - hydrochloric - bacterial - boric - amino A:
amino