Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

[Q]: Question: What element chemically weathers rock by combining with a metal? Answer: oxygen
[A]: Oxygen chemically weathers rock by combining with a metal.

[Q]: Question: What is the charge on a single electron known as? Answer: elementary charge
[A]: The charge on a single electron is and is known as the elementary charge.

[Q]: Question: What is the mechanism that accounts for the drifting of continents? Answer: seafloor spreading
[A]:
Seafloor spreading is the mechanism for the drifting continents.