Can you feel the PRESSURE? Miss Laverty 2012 *Lesson, experiments and worksheets adapted from the Edmonton Public curriculum book*

Can you feel the PRESSURE? 1.If you have a FOIP form, place it in the bin 2.If you are the first person here, please hand out the workbooks 3.Grab today’s handout from the BLUE handout box on the front desk 4.If you are missing a work sheet please grab it from the side shelf by the treasure chest 5.Sit down and show me that you are ready to MAKE IT RAIN!

Make it Rain

Question: can air move water?

Make it Rain Materials: – Flask – Stopper with 2 holes – One short straw that doesn’t reach the water – One long straw that reaches the water

Make it Rain Procedure: 1)Fill flask about half full with water 2)Make sure the bottom of the long straw is submerged in the water 3)Make sure the short straw is above the surface of the water 4)Blow into the short straw 5)Observe and record results

Make it Rain Diagram

Make it Rain Results: – Water sprayed out of the long straw when we blew on the short one

Make it Rain Inferences: – When we blow into the short straw, we increase the air pressure. – The increased air pressure forces the water out through the long straw

Draw Straws Form a group of 4 or 5 When your group is complete, send one person to get a cup for each group member When you have your cup, show me you are ready for water and straws

Draw Straws Explained Question: Can air move water?

Draw Straws Explained Materials – Drinking cup – One straw with a pin hole – One straw that has not been altered

Draw Straws Explained Procedure: 1.Put a hole in one straw with a pin 2.Make sure the pin hole is above the surface of the water 3.Try to suck up the water 4.Try again with a regular straw 5.Observe and record results

Draw Straws Explained Results: – The straw with a hole poked in it did not work

Draw Straws Explained Inferences: – Straws work when you decrease the air pressure in your mouth – When the air pressure in your mouth is less than the pressure of the room it forces the water up the straw

Real Life Example… Vacuum What else?

Wrap-up Does air have Pressure? How do we know? – Yes