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Weather vs. Climate Weather: The general condition of the atmosphere at a particular time and place. Climate: The general weather conditions over many.

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Presentation on theme: "Weather vs. Climate Weather: The general condition of the atmosphere at a particular time and place. Climate: The general weather conditions over many."— Presentation transcript:

1 Weather vs. Climate Weather: The general condition of the atmosphere at a particular time and place. Climate: The general weather conditions over many years.

2 What is air? Air is a mixture of gaseous elements and compounds Those elements are Nitrogen, Oxygen and Argon Other compounds include Carbon Dioxide (CO 2 and Water H 2 O)

3 What determines weather? –Lots of things determine why we have weather and where our weather comes from. –One MAJOR factor that contributes to weather everywhere is AIR PRESSURE or ATMOSPHERIC PRESSURE.

4 ATMOSPHERIC PRESSURE This is defined as the PRESSURE exerted on a surface by the ATMOSPHERE. When measuring pressure, scientists use three different types of units; ATMOSPHERES (atm), millimeters or inches of MERCURY, or MILLIBARS. The instrument that scientists use to measure ATMOSPHERIC (AIR) PRESSURE is called the BAROMETER.

5 AIR PRESSURE DEMOS In order to do demonstrations about air pressure today, we are going to use a VACUUM. This is NOT the device that your mom uses to clean your room! Instead, the purpose of a vacuum is to __________ air pressure.

6 PREDICT: What, if any, changes will you see when shaving cream is placed into a vacuum and the air pressure is reduced? When the pressure is restored? OBSERVE: EXPLAIN:

7 PREDICT: What, if any, changes will you see when shaving cream is placed into a vacuum and the air pressure is reduced? When the air pressure is restored? OBSERVE: EXPLAIN:

8 PREDICT: What, if any, changes will you see when water is placed into a vacuum and the air pressure is reduced? When the air pressure is restored? OBSERVE: EXPLAIN:

9 PREDICT: What, if any, changes will you see when a marshmallow is placed into a vacuum and the air pressure is reduced? When the air pressure is restored? OBSERVE: EXPLAIN:

10 Pull apart the sphere Predict Observe Explain

11 Trash Bag Predict Observe Explain

12 Can Crushing Predict Observe Explain

13 Graduated Cylinder Predict Observe Explain

14 Air Pressure Demos human vacuum crushing can pull apart the sphere vacuum out the air in the jar. –balloon –marshmallow man –shaving cream –Twinkies –boiling water plane underwater pain in joints life in high elevation

15 EXIT ASSESSMENT http://www.youtube.com/watch?v=2WJVHt F8GwIhttp://www.youtube.com/watch?v=2WJVHt F8GwI

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