Inquiry experiment
Aim/Purpose : To pop the bag.
Prediction - What do we think is going to happen: I think the paper bag is going to explode.
Steps:
- Open up a paper towel on a flat surface
- Put 4 levelled teaspoons of baking soda in the centre 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?
The reason for why the paper bag exploded is because as soon as the vinegar met the baking soda it created a gas which created air pressure inside the bag which popped the bag. Surprisingly they both are different reactions. This act can be performed in different ways
Variables - How could we change the variables?
Predict what might happen if we change the variables
Experiment - Were our predictions accurate?
The Science - Why did it happen? Here are some websites to look at…. You may be able to find other websites too!
No comments:
Post a Comment