What is do it enot is I just don’t ewant
Natural selection it has to be 20 characters so disreguard the rest
Answer:
The foaming in the elephant toothpaste demonstration means that a gas is produced. Production of a gas is a clue that a chemical reaction has occurred. The water vapor in the genie-in-a-bottle demonstration also shows the production of a gas.
A. enough statistical support for the research hypothesis when there is not