Evaluation 1 My understanding of a ‘Greenhouse Gas’ is a gas that is present in the atmosphere that acts as an insulator to the earth, trapping reradiating heat close to the earth’s surface. It is a gas that acts much like a greenhouse in its ability to trap heat, hence the name.

Analysis First I filled the cup half way with vinegar. Then I added two drops of food coloring. Then I added the bakingsoda, but the fizz didn’t over flow like a volcano. So while it was still fizzing I added more vinegar, and it over