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Bell Work. 1.) Complete the “bell work” section on your lab worksheet. 2 .) Please get out a BLANK LINED PAPER to turn in at the end of the period !. Marshmallows Under Pressure Lab. Exploring the Relationship between Pressure & Volume ~ Boyle’s Law. Objective.
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Bell Work 1.) Complete the “bell work” section on your lab worksheet. 2.) Please get out a BLANK LINED PAPER to turn in at the end of the period!
Marshmallows Under Pressure Lab Exploring the Relationship between Pressure & Volume ~ Boyle’s Law
Objective Student will write a paragraph using his/her observations to justify a claim about the relationship between pressureand volume of a gas using new vocabulary.
Exploring changes of pressure Opening a soda bottle
Changes of Pressure Opening a soda bottle 2) For the gas inside the bottle, was the pressure increased or decreased?
Changes of Pressure Pumping up a tire
Changes of Pressure Pumping up a tire 3) For the gas inside the tire, was the pressure increased or decreased?
Changes of Pressure Pushing plunger on syringe
Changes of Pressure Pushing plunger on syringe 4) When I pushed the plunger down, was the pressure inside the syringe increased or decreased?
Pressure (FOR YOUR NOTES!) The science definition of pressure: Pressure is the force exerted per unit area on a surface. It is the exertion of force upon a surface by an object, fluid, gas etc., in contact with it.
Pressure With your partner: Share your answers to questions 2, 3, and 4. Then answer: 5) What is exerting the force on the inside surface of the bottle, tire, syringe?
Pressure (FOR YOUR NOTES!) Pressure & Gas: Gases exert pressure by colliding with each other and the surfaces of their containers. Increased pressure means more collisions are occurring, decreased pressure means fewer collisions are occurring.
Review: Volume Discuss with your partner: What is volume? Does gas have volume? Volume: the quantity of three-dimensional space occupied by a liquid, solid, or gas.
Gas Vocabulary (FOR YOUR NOTES!) Inverse relationship If two things have an inverse relationship, one will decrease if the other increases . For example: number of students who take the school bus and number of cars parked in the student parking lot
Gas Vocabulary (FOR YOUR NOTES!) Direct relationship If two things have a direct relationship, one will increase if the other increases . For example: happiness and number of tacos consumed
Pressure and Volume We will explore the relationship between pressure and volume by observing how a marshmallow changes with increasing/decreasing pressure.
But First! As you observe the marshmallow changing, think about how the volume of gas inside the marshmallow is changing!
Directions: • Place one marshmallow at a time in the air piston. • Insert plunger and push down until it is slightly above marshmallow • Hold finger over piston opening • Pull plunger out and push plunger in to change the pressure • THINK ABOUT THE VOLUME OF GAS INSIDE THE MARSHMALLOW!
The relationship between pressure and volumeWrite a paragraph that answers: • How did you increase the pressure on the marshmallow’s gas and how did it affect the marshmallow? • How did you decrease the pressure on the marshmallow’s gas and how did it affect the marshmallow? • Based on your observations, what can you claim about the relationship between pressure and volume of a gas? You must use your NEW VOCABULARY: inverse relationship, force, collisions, increase/decrease