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Trial 1 - Messing Around

1. What do you think will happen to the shape of an empty juice box if you suck air out of it through a straw?

   

   
   
2. Try sucking some of the air out of an empty juice box. Did the result match your prediction? If not, described what happened.
   
   
3. You have described what happened. Now, can you explain why it happened? You can use words and/or a diagram. Refer to Technical Hints to use the drawing tool. Be prepared to share your thoughts with the class.
   
   
   

4. If your explanation involved air pressure, you are the right track. Test your theory by using a pressure sensor. Refer to Technical Hints to connect the pressure sensor. Connect a straw to the air pressure sensor. Refer to Technical Hints for a method to connect the straw.

5. What is the air pressure in the room? Refer to Technical Hints to record pressure measurements.
   
   
6. Try measuring pressure in different parts of the classroom. Does the air pressure vary?

   Yes

   No

   
   
7. Inhale and exhale using the straw. What are the highest and lowest pressures you can create?

   Highest Pressure

   

   Were you inhaling or exhaling?

   

   Lowest Pressure

   

   Were you inhaling or exhaling?

   
   
8. Using the materials available to you, can you and your team come up with a way to measure the pressure in the juice box while you suck air out of the box? Draw a picture of your experimental setup. In your set-up, label the pressure sensor, the juice box, and any other things that you think will make your set-up understandable to someone else. Refer to Technical Hints to use the drawing tool.
   
   
9. Check your design with your teacher. If your teacher approves of your design, indicate it below and build your set-up. If your design is not approved, adjust it according to your teacher's suggestions.

   My teacher APPROVED my design.

   My teacher DID NOT APPROVE my design.