Today we are discussing air pressure vs the pull of gravity.  We are looking at an experiment where a bottle of water has holes poked into it, predicting what will happen and then scientifically explaining the results.

The first experiment is to fill a bottle with water, put on the cap, put a hole in the side with a pin, and then pull out the pin.  What do you think will happen and why do you think that will happen?

• Here is the lesson this experiment is based on
  • 17.05.26 8-3-05 – Air Tight Hole Fights Gravity Pull – Discrepant Event-qzdiz5
• here is the video to watch (with the sound off so you can make your own explanation)
  • https://www.youtube.com/watch?time_continue=4&v=SvnuqkUj1Lo
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The second experiment is to take the bottle and put 3 holes in it in a row from top to bottom.  What will happen when we pull the pins out?  What happened? Explain.

• Here is the lesson this experiment is based on
  • 17.05.26 8-3-05 – The Leaking Milk Carton – Discrepant Event-1cu3elw
• Here is the video to watch (AFTER you hypothesis is finished)
  • https://www.youtube.com/watch?v=2tBWfqKA0Tk
  • 

Students are completing mini labs for this with this structure:

title, problem, materials, hypothesis, result/observation, conclusion.

This is being submitted as one assignment (2 mini-labs), is an in-class assignment, and will be submitted no later than the following day.

NOTE: you should ask Mr. Ewert to show you some of the diagrams that were used in class to explain what we observed in the labs.

…and here is another fun video of this concept.