I just took a test in school today. What question was I asked?

Question I was asked: Sound waves travel fastest in


I just took a test in school today. What question was I asked?

Question I was asked: Which of these activities is most likely to have a positive impact on the environment of Earth?


I just took a test in school today. What question was I asked?

Question I was asked:
Which of these would be a model of diffusion?