instruction:
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.
question:
Question: Which observation demonstrates that light waves travel much faster than sound waves? Answer: An exploding firework is seen before it is heard.
answer:
An exploding firework is seen before it is heard observation demonstrates that light waves travel much faster than sound waves.

question:
Question: Ionic bonds between two atoms require one metal and one what? Answer: nonmetal
answer:
Ionic bonds between two atoms require one metal and one nonmetal.

question:
Question: Enzymes speed up the rate of a specific chemical reaction and is therefore known as what? Answer: biochemical catalysts
answer:
Enzymes speed up the rate of a specific chemical reaction and are therefore known as biochemical catalysts.