Generate a sentence that answers this question: "An example of a circuit would be".

Answer: when an electrical circuit is working properly , electrical current runs through the wires in that circuit

Generate a sentence that answers this question: "A stopwatch is helpful".

Answer: a stopwatch is used to measure time

Generate a sentence that answers this question: "If water gets _____, it may cause a chemical reaction".

Answer:
adding heat to an object sometimes causes chemical reactions