Welcome back!! Term 3 - Scientific Experiments

We have started term 3 by looking at experiments. With our focus on Up Up and Away we are going to work in groups of up to 4 students and prepare an experiment for our Science Fair on August 16th - Week 4.

We began in class with Foaming and Fizzing - see below. We really enjoyed this one, especially when Mrs B made us taste the ingredients first! That is why the title of our experiment is Yuk and Yum! We had lots of reactions when we mixed the 2 chemicals together.

We will be trialing different experiments throughout the term in our reading and writing, using the Scientific report exemplar to write each one up in a scientific way.

                                                                                         

Scientific Experiment Language and Structure

B E G I N N I N G	TITLE	Yuk and Yum!
	QUESTION.	If we mix vinegar and baking soda together will we observe some kind of reaction?
	THESIS.	Vinegar tastes sour and it is a liquid. Baking soda is a solid, soft white powder and it tastes salty and horrible. They are both food substances but based on their different taste, they must be  chemically different. So, if they are mixed together, there might be a chemical reaction.
	HYPOTHESIS.	We predict that when we mix vinegar with baking soda an observable chemical reaction will occur. We might see and hear an explosion, fire, foaming, bubbles, fizzing or something else. The resulting mixture might look and taste different. There might even be a difference in the size of the materials.

M I D D L E	EQUIPMENT AND MATERIALS:	Baking soda Vinegar Container for mixing Teaspoon for mixing
	PROCEDURE	Step 1: Pour some vinegar into a container to a depth of about 2cm. Step2: Use  a teaspoon to measure in half a teaspoon of baking soda. Step 3: Mix with teaspoon. Step 4: Observe and record what happens.
	OBSERVATIONS:	At Step 2 the mixture started to fizz. A fizzing sound was heard, bubbles were seen to appear in the mixture and the materials rose higher in the container. At Step 3, when the materials were mixed, even more bubbles appeared and the volume of the materials in the container rose even higher.When the mixture was tasted, the taste was unpleasant and was similar to baking soda.hi

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ANALYSIS AND CONCLUSION

The goal of this experiment was to see if an observable reaction would take place when vinegar and baking soda were mixed together. The result of our experiment proves that our hypothesis was correct. We predicted that there would be an observable reaction, and there was. There was lots of foaming and fizzing happening and bubbles appeared which mean a gas must have been produced. A quick check online showed us that the gas was carbon dioxide.