Gas Laws: Hands-on Discovery Welcome!. Who is CPO Science? Developer and publisher of inquiry-based science curriculum and hands-on materials How many.

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Presentation transcript:

Gas Laws: Hands-on Discovery Welcome!

Who is CPO Science? Developer and publisher of inquiry-based science curriculum and hands-on materials How many have heard of CPO Science? Sample materials at your table – PLEASE LEAVE FOR OTHER WORKSHOPS – WE CAN MAIL SAMPLES – Thanks very much!

How is CPO Science Different? We design and manufacture high quality science equipment and INCLUDE IT with purchase of textbook sets We support guided inquiry through extensive teacher support material and reader-friendly texts We offer strong science content that is a blend of conceptual and quantitative approaches.

What Subject Areas? High School: Physical Science, Earth/Space Science, Physics First, CP Physics Middle School: Earth, Life, Physical Visit the booth Request samples with raffle forms at end of workshop

Now for the fun!

Press and hold GO button to turn on the DataCollector

Plug the pressure sensor into Sensor 1 port

Choose Data Collection

Push GO!

Meter View Press (KPA)

Check out table and graph views by clicking on these tabs Press (KPA)

What is a kPa, or kilopascal? A pascal (Pa) = 1 N/m 2 1 kPa = 1000 Pa Standard atmospheric pressure = 101,325 Pa Or kPa What does your pressure sensor read for standard atmospheric pressure?

Make a prediction Suppose you connect a syringe to the pressure sensor. What would you have to do with the syringe to make the pressure increase? How would you make the pressure decrease?

What would you have to do with the syringe to create this graph? Time (s) Pressure (kPa)

Connect a syringe to the pressure sensor

Create this graph! Time (s) Pressure (kPa)

Design your own experiment Boyle’s law states that there is a mathematical relationship between pressure and volume that always equals a constant value. The relationship is either:

Collect Data Find the pressure at these volumes 10, 12, 16, 18 Graph pressure vs. volume by hand What is the constant value?

Predict Use your data to predict the pressure at 14 mL. Try it and see how close your prediction was.

Investigate Charles’s Law Go to For Educators Workshop PowerPoint Presentations Charles’ Law

How much can you change the air pressure in an empty plastic bottle by squeezing the bottle with one hand?

Explain, using Boyle’s law, what happens to the balloon inside the bottle when you pull down on the flexible bottom of the bottle.

What does this model have to do with lungs and breathing?

Predict: Does the pressure in the bottle increase or decrease when you pull down on the flexible bottom? What % change in pressure do you expect?

Use your pressure sensor and DataCollector to collect data on how the bottle pressure changes. Compare the results to your prediction.