Inquiry experiment
Aim/Purpose :
To make the bag burst out all the air it contained
Prediction - What do we think is going to happen:
I thought that the bag would get filled with air and float up
Steps:
- Open up a paper towel on a flat surface
- Put 4 leveled teaspoons of baking soda in the center of the paper towel
- Wrap up the baking soda in the paper towel like a package - Keep the baking soda concentrated in the middle of the paper towel
- Tape down your package of baking soda with a piece of masking tape so that everything stays in place
- Open the vinegar and pour it into a cup - until the cup is half full
- Then open a zip lock bag and pour the vinegar into it
- Hold the package inside the zip lock bag, making sure it doesn’t yet make contact with the vinegar - then zip up the bag - making sure that it is completely closed
- Let the package of baking soda drop into the vinegar and the bag up a little so that they start to mix
- Observe what happens
Materials/equipment:
- Baking Soda (4 x tablespoons)
- Vinegar (half a cup)
- Ziploc sandwich bags
- Plastic spoon
- Paper towel
- Masking tape
Roles within the group:
- Presenter - conducts the experiment
- Assistant - collects all the materials
- Videographer - takes a video of the experiment
- Recorder - writes out the steps to follow to correctly conduct the experiment
After students have prepared they can present the experiment in front of the class who will be the audience. The videographer can record the experiment and the recording can be shared at a later stage.
The Result - What did we see happen?
When the presenter/assistant, puts 4 teaspoons of baking and folds it up like a present. Then we pour the vinegar 3 quarters of a plastic cup. Next, we pour the vinegar in a plastic zip-lock bag. After, we put the baking soda cloth in the zip lock bag but just above it. Then we zip up the bag, drop the baking soda in and shake the bag rapidly. Finally, we leave the bag on the ground and……… BANG the bag blows up.
Variables - How could we change the variables?
Predict what might happen if we change the variables
Experiment - Were our predictions accurate?
We tried out two of our variables. The first variable we tried was having less baking soda and more vinegar. The result was it went much faster than it did when we did it normally. The second variable we tried was having more baking soda and less vinegar. The result was it went burst much more slowly than it did when we did it in the normal way.
The Science - Why did it happen? Here are some websites to look at…. You may be able to find other websites too!
The vinegar creates a reaction and the two chemicals work together to create a gas, Gass need a lot of room to spread out and the carbon dioxide starts to fill the ziplock packet and then moves into the balloon to inflate it. And finally, it popped.
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