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.

[EX Q]: Question: What is a pair of valence electrons in a bonded atom that does not participate in bonding called? Answer: lone pair
[EX A]: A pair of valence electrons in a bonded atom that does not participate in bonding is called a lone pair. Lone pair electrons contribute to molecular shape.

[EX Q]: Question: What is the term for a state of matter that yields to sideways or shearing forces? Answer: fluid
[EX A]: Section Summary 11.1 What Is a Fluid? A fluid is a state of matter that yields to sideways or shearing forces. Liquids and gases are both fluids. Fluid statics is the physics of stationary fluids.

[EX Q]: Question: How does the core of the sun radiate energy? Answer: nuclear fusion
[EX A]:
The extremely hot core of the sun radiates energy from nuclear fusion.