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Gas In A Syringe Investigation

Gas In A Syringe Investigation. Begin the write up in your lab journal. Draw and label a syringe in your lab journal. Parts of Syringe. Syringe Body. Tip. Plunger. Gas Molecules. Activity #1. 1. Remove the tip cap. 2. Pull the plunger all the way back without separating the pieces.

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Gas In A Syringe Investigation

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  1. Gas In A SyringeInvestigation Begin the write up in your labjournal

  2. Draw and label a syringe in your lab journal Parts of Syringe Syringe Body Tip Plunger Gas Molecules

  3. Activity #1 1. Remove the tip cap. 2. Pull the plunger all the way back without separating the pieces. Tip cap

  4. Notice a sound of moving air? More gas molecules are entering the syringe.

  5. Now push the plunger closed Hear and feel the air coming out? That is gas molecules being pushed out.

  6. What have we learned? • Weather happens in our atmosphere • Air is Earth’s atmosphere • Molecules are 2 or more atoms hooked together • The parts of a syringe • Proper use of a syringe Write what you learned

  7. What have we learned? • Air is made of gas molecules • Air can move • We call moving air wind Write what you learned

  8. Activity #2 1. Replace the tip Cap on the closed syringe 2. Try to pull the plunger out and think about what is happening

  9. Remove the tip cap from the closed syringe 2. Now, pull the plunger out and think about what is happening

  10. What made the difference? Air can be pulled into the syringe with the cap off but can’t with the cap on A vacuum was formed and air rushed in to fill the empty space

  11. Activity #3 1. Connect a tube to the end of a syringe with the plunger pulled out. 2. Connect the other end of the tube to a syringe with the plunger pushed all the way in Syringe 1 Syringe 2 3.Draw and label your set up, do not move any parts

  12. Write the following Investigation Question: What will happen if I push in the plunger? Prediction:If I push the plunger in on syringe #2, then __________ _______________________________ because_____________________________________________________ .

  13. Now try your prediction Discuss what happened with your partner Write a conclusion statement Remember: Answer the Investigation question. What did you think would happen? Was your hypothesis correct? What really did happen? Was your results the same as the other students? Why does this happen?

  14. What have we learned? • Air takes up space • Air has volume • Volume means the amount of • space that something takes up • Air will move into a new • space to equalize the pressure Copy what we learned into your L.J.

  15. Activity #4 1. Remove one syringe from the tube 2. Pinch the end of the tube shut and try to push the plunger in. What happens? Discuss this with your partner Syringe 1 Syringe 2

  16. Air Pressure is always pushing on everything in all directions. The greater the air pressure the greater the push in all directions. Copy notes Pressure is a pushing force.

  17. What have we learned? • Air takes up space • Air can be compressed into less • space (forced into smaller volume) • Air has pressure • The more you compress air the • higher the air pressure Copy Notes 5 molecules Not Compressed, Low pressure 5 molecules Compressed, High pressure

  18. Air Pressure changes with elevation

  19. Nitrogen 78% Oxygen 21% As you go up in elevation the number of gas molecules become less, less compacted, and there is less air pressure Elevation Sea Level on Earth

  20. Oxygen is 21% of the air • Air is thinner the higher you go in • elevation Do you see any problems climbing Mount Everest?

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