People's Education Edition Physics for Grade 8, Volume 2
People's Education Edition Ninth Grade Physics Complete Book
Shanghai Science Edition Ninth Grade Physics
People's Education Edition Physics for Grade 8, Volume 1
Shanghai Science Edition 8th Grade Physics
Beijing Normal University eighth grade physics volume one
Lu Jiao Edition Ninth Grade Physics Volume 2
Lu Jiao Edition Ninth Grade Physics Volume 1
Beijing Normal University Ninth Grade Physics Volume 1
Guangdong and Shanghai Edition Ninth Grade Physics Volume 1
Lu Ke Edition High School Physics Compulsory Course One
People's Education Press High School Physics Compulsory Course II
Lu Jiao Edition Eighth Grade Physics Volume 2
Beijing Normal University Ninth Grade Physics Volume 2
Guangdong and Shanghai Edition Ninth Grade Physics Volume 2
Guangdong and Shanghai version of eighth grade physics volume 2
Category | Format | Size |
---|---|---|
People's Education Edition Physics for Grade 8, Volume 2 | pptx | 6 MB |
Description
"Atmospheric Pressure" Pressure PPT courseware 4
There is pressure inside a liquid in all directions due to the gravity and fluid nature of the liquid.
So, air is also subject to gravity and has fluidity. Is there atmospheric pressure in all directions around us?
learning process:
1. Does the atmosphere have pressure?
2. Causes of atmospheric pressure:
3. Is the atmospheric pressure high?
4. How big is the atmospheric pressure?
5. Changes in atmospheric pressure:
Learn from the sea and pick up shells
Is the air quality?
The earth we live on is a blue planet. Thick gases surround the solid land, nourishing and protecting life on Earth. The thick layer of gas is usually called the atmosphere.
In the atmosphere, the air below is pressed by the air above, and the earth is pressed by the entire atmosphere. Air has mass, and under the action of the earth's gravity, it will generate pressure on the area it acts on.
Why does atmospheric pressure occur?
1. Atmospheric pressure
1. Cause: Because the air is affected by gravity.
2. Objects immersed in the atmosphere are subject to the pressure generated by the atmosphere.
Why can't the two leather bowls be easily pulled apart?
explain:
1. Squeeze out the air in the leather bowl, and the air pressure inside will decrease.
2. The air pressure in the leather bowl is less than the atmospheric pressure.
3. Due to the strong atmospheric pressure, the two leather bowls are pressed together tightly, so the two leather bowls are not easily pulled apart.
changes in atmospheric pressure
1. A standard atmospheric pressure 1.013x105Pa or 760mm mercury
2. Atmospheric pressure decreases as altitude increases
3. The higher the air pressure on the liquid surface, the higher the boiling point of the liquid; conversely, the lower the air pressure, the lower the boiling point of the liquid.
4. The relationship between gas pressure and gas volume: Under the condition of constant temperature, for a certain mass of gas, its pressure increases when its volume decreases; its pressure decreases when its volume increases.
What did you learn?
1. Through activities, we know that there is atmospheric pressure around the earth and understand the causes of atmospheric pressure.
2. The Magdeburg Hemisphere Experiment designed by Otto Glick proved that atmospheric pressure not only exists, but is also very large.
3. According to the Torricelli experiment, the value of atmospheric pressure was measured to be 1.013×105Pa. One standard atmospheric pressure is 1.013×105Pa.
4. Atmospheric pressure decreases as altitude increases
5. The higher the air pressure on the liquid surface, the higher the boiling point of the liquid; conversely, the lower the air pressure, the lower the boiling point of the liquid.
Consolidate practice
1. Since the air is also affected by the _____ force and can flow, there is pressure inside the air in the _______ direction.
2. The pressure exerted by the atmosphere on objects immersed in it is called _____________, or _________ for short.
3. The famous ____________ experiment effectively proved the existence of atmospheric pressure. This experiment was conducted by ____________.
4. When the fountain pen absorbs ink, press the spring leaf on the pen a few times. The gas pressure in the pen bladder will be _________. Under the action of _________, the ink will be "sucked" into the rubber tube.
Preview homework
The following is the correct understanding of "the location where the flow velocity is greater, the pressure is smaller" is ( )
A. Only applicable to gases
B. Only suitable for liquids
C. Suitable for gases and liquids
D. Suitable for solids, gases and liquids
Keywords: pressure teaching courseware, atmospheric pressure teaching courseware, new PEP eighth grade physics PPT courseware for the second volume, eighth grade physics slide courseware download, pressure PPT courseware download, atmospheric pressure PPT courseware download, .ppt format
For more information about the "Pressure, Atmospheric Pressure, Strong" PPT courseware, please click on the Pressure ppt Atmospheric Pressure ppt tag.
"Atmospheric Pressure" Pressure PPT courseware 9:
"Atmospheric Pressure" Pressure PPT Courseware 9 Review: 1. What causes liquid pressure? 1. By gravity 2. Has fluidity 2. What are the characteristics of liquid pressure? There is pressure inside the liquid in all directions; the pressure inside the liquid increases with depth; at the same depth...
"Atmospheric Pressure" Pressure PPT Courseware 8:
"Atmospheric Pressure" Pressure PPT courseware 8 Import new lesson Our earth is covered by an atmosphere hundreds of kilometers thick. Most of them are distributed within tens of kilometers above the earth's surface. We live in an ocean of atmosphere. This thick layer of gas is often called the atmosphere. ..
"Atmospheric Pressure" Pressure PPT courseware 7:
"Atmospheric Pressure" Pressure PPT courseware 7 Review of old knowledge 1. The concept of atmospheric pressure The atmosphere exerts pressure on objects immersed in it. This pressure is called atmospheric pressure. 2. The size of atmospheric pressure Standard atmospheric pressure p0= 1.013105 Pa Learning objectives (1) Understand the atmosphere..
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Update Time: 2024-10-01
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