Q: Chemical elements and water are recycled through what cycle? Choices: - biogenic - evaporation - dynamical - biogeochemical A:
biogeochemical

Q: What corrosive substances capable of dissolving many metals can cause contamination if spilled? Choices: - salts - bases - ions - acids A:
acids

Q: Q: When waves of two different frequencies interfere, what phenomenon occurs? Choices: - making - opening - soaking - beating A:
A: beating

Question: Q: When skunks are in danger what do they give off? Choices: - warning howls - ejected quills - sweet odor - foul smell A:
Answer: foul smell

*Question*
Q: The dna is wound around proteins called what? Choices: - leptons - nucleotides - pepsins - histones A:
**Answer**
histones

Q: What types of energy is released during a chemical reaction? Choices: - human, magnetic, electrical - temperature , electricity , light - magnetism, electricity, light - heat, electricity, light A:
heat, electricity, light