"Atmospheric Pressure" PPT download

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"Atmospheric Pressure" PPT download

Part One: Daily necessities and atmospheric pressure

1. Vacuum compression

How it works: Storing quilts, pillows and other items takes up a lot of space. If you put these items in a vacuum compression bag and take out the air inside the bag, the outside atmospheric pressure will flatten them.

2. Vacuum cleaner

Working principle: When the vacuum cleaner works, it will discharge the air inside, forming a low-pressure area inside. In this way, the outside air will enter through the floor brush of the vacuum cleaner carrying dirt under the action of atmospheric pressure.

3. Dropper to absorb liquid

4. The nurse gives the injection and the syringe draws the medicine.

5. Various suckers

Atmospheric pressure PPT, part 2: The impact of the atmosphere on weather

Areas with higher air pressure are called high-pressure areas, where air flows from top to bottom.

The weather is sunny and the air is dry.

Areas with lower air pressure are called low pressure areas, where air flows from bottom to top.

The sky is cloudy and rainy.

Why are there so many sunny weather in high-pressure areas? Are there many rainy days in low pressure areas?

As the air rises, the air pressure on the ground surface decreases, forming ______; and the rising air contains a certain amount of ______. As the temperature increases with altitude, the water vapor gradually ______, forming clouds at high altitudes. When clouds accumulate, they may form ______.

On the contrary, if the air sinks, the air pressure on the ground surface increases to form ______. Since the sinking and heated high-altitude air will not produce ______ of water vapor, there will be no cloud formation, so it is ______.

Atmospheric pressure PPT, part 3: The impact of atmospheric pressure on the human body

On sunny days I feel happy, on rainy days I feel tired and restless.

This is mainly due to the fact that the air pressure is higher on sunny days and the air pressure is lower on rainy days.

Why do astronauts wear spacesuits?

The environment of space is almost a vacuum, and the air pressure is close to zero. The cabin of the spacecraft is pressurized, and there is generally no danger to astronauts in the cabin. But once an astronaut steps out of the aircraft and comes into contact with the space outside the aircraft or the pressurization facility of the spacecraft's habitation module fails, the air in his body will be forced out of the body and the blood vessels will rupture.

Atmospheric Pressure PPT, Part 4: The Effect of Atmospheric Pressure on the Boiling Point of Liquids

1. In high mountains, it is difficult to cook rice with ordinary pots. Do you know what causes this?

Atmospheric pressure decreases with altitude. Air pressure is low in high mountains.

2. Is there any way to solve this problem?

You can use a pressure cooker to cook rice.

3. Do you know what principle the pressure cooker is made of?

Atmospheric pressure PPT, part 5: summary

1. Daily necessities and atmospheric pressure

1. Vacuum compression

2. Vacuum cleaner

3. Dropper to absorb liquid

4. Inhale medicine with syringe

5. Various suckers

6. Piston pump

7. Centrifugal water pump

2. The influence of atmospheric pressure on weather

1. Areas with higher air pressure are called high pressure areas. Mostly sunny weather.

2. Areas with lower air pressure are called low pressure areas and are prone to rainy weather.

3. The impact of atmospheric pressure on the human body

Keywords: Zhejiang Education Edition eighth grade science PPT courseware free download, atmospheric pressure PPT download, .PPT format;

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"Atmospheric Pressure" PPT courseware:

"Atmospheric Pressure" PPT courseware Part 1: Practice: 1. If the mercury is replaced by water, calculate how high the water column can be supported by atmospheric pressure? 2. Immerse the measuring cylinder filled with water with the mouth facing down in the water. Grasp the bottom of the cylinder and slowly lift it up until the opening does not leave the water.

"Atmospheric Pressure" PPT:

"Pressure of the Atmosphere" PPT Part One Content: Classroom Experiment Experiment 1 Demonstration of Cup Covering Experiment 1. Place the piece of cardboard flat on the mouth of the flat glass, hold it down with your hand, and turn it upside down. What phenomenon will you see after you let go? Discussion 1. Why put a hard sheet on the rim of an empty glass...

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Update Time: 2024-10-03

This template belongs to science courseware Zhejiang Education Edition Eighth Grade Science Volume 1 industry PPT template

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