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

Question I was asked: Scientists wonder how the Egyptian pyramids were built. They think that the huge blocks of stone may have been put into place by pushing them up a sloping pathway. The pathway is which type of simple machine?

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

Question I was asked: What would be the best way to determine the role of squirrels in a forest ecosystem?

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

Question I was asked:
When stratospheric ozone levels are reduced, the amount of ultraviolet radiation hitting Earth increases. Ozone depletion is most often caused