In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

[Q]: Question: Hot magma beneath the surface mixes with water and forms what? Answer: gas
[A]: Hot magma beneath the surface mixes with water and forms gas.


[Q]: Question: What branch of science is based on the modern atomic theory, which states that all matter is composed of atoms? Answer: chemistry
[A]: Chemistry is based on the modern atomic theory, which states that all matter is composed of atoms.


[Q]: Question: Hagfishes have a skull made of what? Answer: cartilage
[A]:
Hagfishes have a skull made of cartilage.