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: How high or low a sound seems is associated with what property of the sound? Answer: pitch
How high or low a sound seems to a listener is its pitch. Pitch, in turn, depends on the frequency of sound waves.

Question: What type of rocks form from cooled magma or lava? Answer: igneous
Igneous rocks form from cooled magma or lava.

Question: In what way do bacteria reproduce? Answer: binary fission
Bacteria reproduce by binary fission, resulting in two daughter cells identical to the parent cell.