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 are the "code words" of the genetic code? Answer: codons
[EX A]: Reading the Genetic Code. The genetic code is read three bases at a time. Codons are the code words of the genetic code. Which amino acid does codon 2 in the drawing stand for?.

[EX Q]: Question: What word describes a change in behavior that occurs as a result of experience? Answer: learning
[EX A]: Learning is a change in behavior that occurs as a result of experience.

[EX Q]: Question: What type of chemicals do ants communicate with? Answer: pheromones
[EX A]:
We must use energy to get energy resources. This is true of non-renewable and renewable energy. Getting fossil fuels so that they can be used takes many steps. All of these steps use energy.