instruction:
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.
question:
Question: When two haploid gametes unite during fertilization they form what? Answer: a diploid cell
answer:
diploid cell that forms when two haploid gametes unite during fertilization.

question:
Question: Instead of wood, what do some fireplaces use? Answer: propane
answer:
Some fireplaces use propane gas rather than wood as fuel.

question:
Question: What are large sheets of ice that cover relatively flat ground called? Answer: continental glaciers
answer:
Continental glaciers are large ice sheets that cover relatively flat ground. These glaciers flow outward from where the greatest amounts of snow and ice accumulate.