Paper Mache Volcano
Since the 1700s, some 50 volcanoes have erupted and are called active. Most active volcanoes in Alaska are found along Cook Inlet and down through the Aleutian Islands. Inactive volcanoes, those that haven't erupted for several hundred years, can be found in every region of the state.
Alaska has 80 percent of all the active volcanoes in the United States and 10 percent of those found in the world.Sources:
http://www.avo.alaska.edu/ Alaska Almanac. Alaska Northwest Books, 2008Alaska's Volcanoes, Alaska Geographic, Volume 18, Number 2Alaska's Natural Wonders, Bob Armstrong and Marge Hermans, Alaska Northwest Books, 2000
The solid baking soda was placed in liquid vinegar producing carbon dioxide gas, which is evident because of the formation of bubbles in the foaming mixture. Eventually all of the solid dissolved and reacted producing a new liquid solution.
During the reaction, a solid and liquid have been chemically reacted to form a gas and a liquid. This experiment can also be used to explain foams, as liquids or solids containing gas bubbles.
SourceThe yeast contains an enzyme called Catalase that breaks down hydrogen peroxide (H2O2) into oxygen gas and water. The oxygen gas gets trapped by the soap, and you get a large foamy solution that squirts out of the top of the bottle!
The cool thing about this activity is that the enzyme Catalase can also be found in potatoes, dogs and even us! We have the same enzyme in our bodies. That is why you see the 3% hydrogen peroxide bubble when you put it on a cut or scrape. The oxygen released is what kills the germs in the cut. We have this enzyme because we naturally produce low amounts hydrogen peroxide as a byproduct of oxidative metabolism (the way that a cell gains useful energy). Our cells need energy, but low amounts of hydrogen peroxide are produced and need to be neutralized through enzymes like Catalase.
https://www.imaginationstationtoledo.org/education-resources/diy-activities/elephant-s-toothpaste/A chemical reaction is a process in which substances undergo a chemical change to form a different substance. In this reaction, the hydrogen peroxide is catalyzed by the yeast to release the oxygen molecules. The foam is oxygen-filled bubbles that result from the hydrogen peroxide being broken down into water (H2O) and oxygen (O2).
This reaction uses yeast as a catalyst. A catalyst is a substance that increases the rate of a chemical reaction. In this case, the yeast helps to separate the oxygen from the hydrogen peroxide.
In this reaction, the bottle will feel warm to the touch because it is an exothermic reaction. This means that the chemical reaction releases heat as it occurs. The opposite also demonstrates a chemical reaction. An endothermic reaction would feel cool to the touch.
