Question: When Amy added water to a mixture of baking soda and citric acid, the mixture began fizzing. Amy concluded there was a chemical reaction because it fizzed. Why is fizzing evidence of a chemical reaction?
Reference answer: The fizzing indicates a gas, a new material, is produced. When a new material is produced, a chemical reaction has occurred.

Student answer: Because when it fizzing it releases a gas. When a gas forms from 2 materials it is a gas.

Student answer: Because the baking soda and citric acid started out plain but when you poured water in it reacted.

Student answer: Because it shows and once you see it you will know that it is a chemical reaction because it starts to look like little bubbles and that is what a chemical reaction is.

Student answer: Because it indicates something else is produced.

Student answer: Because the chemicals clash and fizz.

Student answer: Because It means that it is a gas or new material!

Student answer: It created a gas and new material was made.

Student answer: Because the 2 solutes and the solvent made a gas.

Student answer: It indicates a gas.

Student answer: Because the bubble makes the solution or mixture different.

Student answer: Because it was letting out gas.

Student answer: Gas was in it so that why it start fizzing.

Student answer: It is a clue because it is making a gas and that is a clue so you know that a chemical reaction is about to happen.

Student answer: Because you made a gas.

Student answer: Because a chemical reaction creates gas bubbles or a precipitate.

Student answer: It was fizzing because when he a mix baking soda and citric acid together the fizzing have meant that it dissolved and made bubbles.

Student answer: Because it shows that something other than just doing nothing.

Student answer: Because something has to happen for the precipitate to be made.

Student answer: Because fizzing is created by gas bubbles.

Student answer: Because fizzing is a sign of gas leaving a material and that is a chemical reaction.

Student answer: Because when it does that you know that you have made gasses and gasses are made when chemical reactions occur.

Student answer: Fizzing is a reaction.

Student answer: Sometimes because fizzing means that gas is escaping and that is a chemical reaction.

Student answer: Because if it was just water it would not fizz.

Student answer: Because when it fizzes there is gas and that is a sign of a chemical reaction.

Student answer: It is evidence because it made gas and fizzing occurs only when one material does not like the other one.

Student answer: Fizzing evidence of a chemical reaction because when it fizzes it means it is producing gas.

Student answer: It is a chemical reaction because it made a gas and a gas only appears if there is a chemical reaction.

Student answer: Something happened so it is a reaction.

Student answer: Because fizzing is a reaction and so it had to be a chemical reaction.

Student answer: Because you are putting 2 mixtures together so when it starts fizzing that is how you know it is a chemical reaction.

Student answer: Because it did something.

Student answer: Because it fizzed and moved so that is how.

Student answer: Because it is bubbling and bubbling is a reaction when you mix stuff together and it bubbles.

Student answer: Because when more than 2 chemicals are mixed it produces fizzing.

Student answer: Because the material before did not use to fizz until they were put together.