# atmospheric pressure

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## Presentation Description

kid to high level.specially based on SSC,CBSC Board. if you have any doud for related subject please email me-tvoltun@yahoo.com i will solve your all problem student and teacher also welcome. based on science Project, Exam,notes,assignment,lesson plane etc

## Presentation Transcript

### Atmospheric Pressure:

By Azeem Atmospheric Pressure

### Hold you hand in front of your face And blow.:

Hold you hand in front of your face And blow.

### Now gently blow outward towards your fingers. What do you feel?:

Now gently blow outward towards your fingers. What do you feel?

Air AIR

### Slide 5:

5 The air is made up of tiny particle( molecules ).

### Slide 6:

6 Air molecules are everywhere.

### Slide 7:

Air is the similar Meaning of Atmosphere

### Slide 8:

8 Like all matter(All object), air molecules have mass . kg

### Slide 9:

9 The mass of the air molecules all around us is called the air pressure . Or Air pressure is the Force of weight of tiny particle of Air.

### Slide 11:

Atmosphere is a layer of gas that surrounds a world

### Atmospheric Pressure and Altitude :

Atmospheric Pressure and Altitude Atmospheric pressure decreases as the altitude increases.

### Slide 13:

Atmospheric Pressure is measured by Barometer .

### When we Squished or Compress or Force to any object Effect is only the Area of the object.:

When we Squished or Compress or Force to any object Effect is only the Area of the object.

### Force Area:

Force Area Pressure

### Take nail and hammer.:

Take nail and hammer.

### Hammer the nail into the wall.:

Hammer the nail into the wall.

### Now by holding the Flat Head on the wall.:

Now by holding the Flat Head on the wall.

### What you will see?:

What you will see?

### Hammer is not going into the wall. Because Nail head contain Large area Less force is applied. Small Area Large Force.:

Hammer is not going into the wall. Because Nail head contain Large area Less force is applied. Small Area Large Force.

### Pressure Effect substance in the liquid state.:

Pressure Effect substance in the liquid state. Take plastic bottle . Make a hole near its base. Fit glass tube into this hole and and fit balloon over the mouth of tube . Slowly Fill bottle with water

### Why this happened?:

Why this happened? Area is same but mass of the water increases. Therefore, the force and pressure increases.

### Pressure effect substance in the gases state.:

Pressure effect substance in the gases state. As you blow more and more air into a balloon. Size increases. if you blow more & more air it burst. It means like liquid or gas make pressure on the wall of Their area.

### Air pressure Equal in all direction.:

Air pressure Equal in all direction. We get balloon in many different shape. If air filled that shape, balloon take that shape. like bicycle tube. Air and water are fluid(flow) substance. Fluid substance exert equal pressure in all directions. That is why give uniform(same) shape.

### Take two Plastic bottle.:

Take two Plastic bottle.

### Joint them near it base by rubber tube.:

Joint them near it base by rubber tube.

### Close the tube with a clamp.:

Close the tube with a clamp.

### Fill 1 bottle completely and other fill justlittle.:

Fill 1 bottle completely and other fill justlittle .

### Now open the clamp. what happened?:

Now open the clamp. what happened?

### Water flow from higher water level to lower.:

Water flow from higher water level to lower.

### Water flow from higher water level to lower.:

Water flow from higher water level to lower.

### Water flow from higher water level to lower.:

Water flow from higher water level to lower.

### Water flow from higher water level to lower.:

Water flow from higher water level to lower.

### Water flow from higher water level to lower.:

Water flow from higher water level to lower.

### When both water level is equal they stop.:

When both water level is equal they stop. Fluids flow from a region of higher pressure to a region of lower pressure.

### Consider the mass of Atmosphere 1000kg How do we survive carry Such weight on our head.:

Consider the mass of Atmosphere 1000kg How do we survive carry Such weight on our head. 1000kg Why we cant feel atmospheric pressure

### Pressure inside our body is also same. that is why we do not feel atmospheric pressure.:

Pressure inside our body is also same. that is why we do not feel atmospheric pressure. that is why we do not get crushed

### When we travel by airplane why earache?:

When we travel by airplane why earache? The pressure of the air surrounding us Changes. As the plane lands, Air pressure Increases. increase pressure eardrum Causes air ache.

### Rubber suckers stick tightly on glass surface Why?:

Rubber suckers stick tightly on glass surface Why? Easy Available in market use in Home. Kid Play

### Slide 40:

When the sucker is pressed on to the glass. The air between the rubber sucker and the glass is forced out. So that There is no Air inside sucker. Outsides atmospheric pressure pressing on it it makes it stick tightly to the glass. Working

### Experiment- Air Pressure is same on all sides.:

Experiment- Air Pressure is same on all sides. Take a can Pour a little water in it. heat it. When the water starts to boil, steam coming from the hole. Close the lid and cool it. Take ice water for later use. Take a can. Add Little Water and heat. When the water boil quickly put the can on ice water. The can crushed from all side. Why ? When water boil, steam Inside the can passes out & also passes out the Air. When you cool or put the Hot Can on ice water. The can temperature DECREASES. Steam condensed back Into water. The air pressure outside is higher then inside the can. weight air outside crush the can all side.

### Otto von Guericke builds the first vacuum pump and created vacuums in various containers. He invented a pump to suck out the air from a closed container.:

Otto von Guericke builds the first vacuum pump and created vacuums in various containers. He invented a pump to suck out the air from a closed container. Otto von Guericke, engraving by Anselmus von Hulle , ( 16011674 ) Born November 20, 1602 Magdeburg , Germany Died May 11, 1686 (aged 83) Hamburg , Germany Nationality German Fields Physicist , Politician Known for Research and experiment for vacuums

### He conducted an Experiment in which he joint two hollow Hemispheres using pump he removed air inside now he tried to remove hemisphere but he couldn't .the strength found in atmospheric pressure.:

He conducted an Experiment in which he joint two hollow Hemispheres using pump he removed air inside now he tried to remove hemisphere but he couldn't .the strength found in atmospheric pressure. Power of atmospheric pressure

### Example - atmospheric Pressure do at Home.:

Example - atmospheric Pressure do at Home. Procedure:- Fill a glass with water. Cover it with a stiff card. Now turn the glass upside down. The cardboard does not fall and the water remains in the glass even though it’s not supported by anything. Conclusion:- The force caused by the atmospheric pressure of the cardboard is greater than the weight of the water in the glass.

### Example2-Pump:

Example2-Pump On pressing rubber bulb the air inside pull out, the atmospheric pressure inside the bulb will decrease. The atmospheric pressure outside pushes the liquid up into the dropper tube. When we press the bulb, again ink in the tube is pushed out.

### THE SPRAY PUMP-:

THE SPRAY PUMP- When the piston is pulled up, the atmospheric pressure inside the cylinder will decrease. The atmospheric pressure outside pushes the liquid up into the pump.

### Reference Website-:

Reference Website- http://tlc.howstuffworks.com/family/science-projects-for-kids-air-pressure4.htm http://kids.earth.nasa.gov/archive/air_pressure/index.html http://www.hitxp.com/zone/tutorials/physics/difference-between-mass-and-weight-physical-body/ http://www.buzzle.com/articles/air-pressure-experiments.html http://starryskies.com/try_this/baro1.html http://weather.about.com/od/weatherinstruments/a/barometers.htm http://www.kidsgeo.com/geography-for-kids/0081-atmospheric-pressure.php http://www.rsc.org/chemsoc/timeline/pages/1645.html http://www.one-school.net/Malaysia/UniversityandCollege/SPM/ http://www.smartlearning.in/login.php?location=/welcome_page.php