Ques: Answer the following question given this paragraph: All sound waves begin with vibrating matter. The vibrations generate longitudinal waves that travel through matter in all directions. Q: What do all sound waves begin with? Choices: - oscillating matter - talking matter - enclosing matter - vibrating matter A:
Ans: vibrating matter

Ques: Answer the following question given this paragraph: The different feeding positions in a food chain or web are called trophic levels. Q: Different feeding "positions" in a food chain or web are associated with what kinds of levels? Choices: - benthic - autotrophic - heptic - trophic A:
Ans: trophic

Ques: Answer the following question given this paragraph: Chemical elements and water are recycled through biogeochemical cycles. The cycles include both biotic and abiotic parts of ecosystems. Q: Chemical elements and water are recycled through what cycle? Choices: - biogenic - evaporation - dynamical - biogeochemical A:
Ans: biogeochemical

Ques: Answer the following question given this paragraph: Because chemical changes result in different substances, they often cannot be undone. Some chemical changes can be reversed, but only by other chemical changes. Q: By what kind of change can a chemical change be reversed? Choices: - another carbon change - another thermal change - another radioactive change - another chemical change A:
Ans:
another chemical change