5. Why is the following equation invalid? Al + 202 + Al2O3
O A. An atom of aluminum (AI) is created in the reaction.
O B. An atom of oxygen (O) is destroyed in the reaction.
O C. The equation violates the Law of Conservation of Mass.
O D. All of the above.

According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources? (site 1)

During a hot day, warm and moist air rises and cools in the atmosphere. which even would occur next on such a day? a. condensed droplets would gather to become water vapor. b. water vapor would condense into tiny droplets. c. water droplets would evaporate to form rain and snow.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic