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Transcript of cookie chemistry
- This chemical reaction was an endothermic reaction.
You can tell when a chemical reaction has taken place if a new substance is formed. Another way to tell if a chemical reaction has taken place is when the properties change. Some examples are change in color, form, and smell.
1. butter 6. vanilla extract
2. eggs 7. baking soda
3. salt 8. flour
4. sugar 9. chocolate chips
5. brown sugar
2 1/4 cups of flour
1 teaspoon of baking soda
1 teaspoon of salt
1 stick of butter (melted)
3/4 cup of sugar
3/4 cup of brown sugar
1 teaspoon of vanilla extract
2 large eggs
2 cups of chocolate chips
by: Julia and Jillian section: yellow
- The chemical reaction used thermal heat to cook the cookies.
- The thermal heat caused the cookie dough to flatten out and form a cookie.
- In this chemical reaction an example of an inhibitor were the preservatives.
- In this chemical reaction an example of a catalyst was the heat given off from the oven.
How could you tell a chemical reaction was taking place?
Chemical reactions involve two changes; change in form and change in energy. By doing this project I've learned a lot about chemical reactions. I learned that thermal heat can chemically change cookie dough into delicious cookies. This project showed me how baking cookies is an endothermic reaction. An endothermic reaction is a reaction in which energy is absorbed. I know this reaction is endothermic because it deals with thermal heat changing a substance. The project demonstrated how chemical reactions can change substances to new substances. The substance started out as a batter and transformed into a new substance. In conclusion, the most important thing I learned is that chemical reactions occur all around me everyday.
- Preheat oven to 375 degrees fahrenheit.
- combine dry ingredients.
- combine wet ingredients.
- add wet ingredients to dry.
- bake for 9 to 11 minutes