At Science on Thursday, we mixed a variety of powders and used our senses to find their different features. We started off by investigating icing sugar and listed the features on a piece of sheet so we can see the differences of each ingredient.
After the icing sugar, we went followed down the list which was sodium bicarbonate (baking powder). The icing sugar was different from the NaHCO₃ (sodium bicarbonate) because it tasted different but everything else was the same. 
When we were done investigating both ingredients, we mixed both components and investigated on it. The next items on the list were vitafresh powder, C₆H₈O₇ (citric acid) and C₄H₆O₆ (tartaric acid). The vitafresh powder was extremely sweet, the citric acid which comes from the juices of orange skin and lime skin was extremely sour and the tartaric acid which comes from the skin of grapes, was also sour but not as sour as the citric acid.
When we were finished investigating all the ingredients, we all mixed them up in an enormous beaker. We didn't get a chemical reaction when we mixed them because they were all powder and some type of liquid is always needed to activate a chemical reaction. However, when we placed the mixture into our mouth, the chemical reaction activated because of the saliva that we produce. We could hear continuous bubbles dehydrating, making gas bubbles which is CO² (carbon dioxide). We were able to hear, taste, feel and smell the chemical reaction in our mouth.
Overall, this week of Science was a very interesting and fascinating day. I hope we could investigate on more types of powders for our last day of Science.
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