If a chemical reaction such as photosynthesis begins with 6 atoms of carbon [C], how many atoms of carbon [C] should be in the products?
A: 6 atoms of carbon [C]

Which of these will always produce a magnetic field?
A: an electric current

Which information is used in a station model?
A: wind direction in a particular point and time

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?
A:
inclined plane