The hypothesis is that increasing levels of carbon dioxide lowers the pH of water, making it more acidic.

You will fill a water bottle with tap water, measure the pH level, blow air through a tube into the water for 3 minutes, measure the pH level again, replace the water, fit a plastic bag around a car exhaust pipe, insert a hose into the water, start the car and observe the air bubbles for 3 minutes, and measure the pH level again.

You will need an empty water bottle, tap water, two rubber hoses, an air-tight plastic bag, pH paper, a stop watch, masking tape, and a car that runs on gasoline.

The results show that increasing the level of carbon dioxide in the water-filled bottle lowers the pH of the water, making it more acidic. This proves that our hypothesis is true.

This science project is interesting and unique because it shows how human activities are affecting our oceans in a very real way.

Variations of this experiment include using sea water instead of tap water, and increasing the time the air bubbles are blown to see if the results are different.

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!