"Atmospheric Pressure and Human Life" Magical Pressure PPT Courseware

Description

"Atmospheric Pressure and Human Life" Magical Pressure PPT Courseware

teaching objectives

Know the pressure in the atmosphere and its causes

Understand Torcolli's experiment and know what a standard atmospheric pressure is.

Understand the relationship between atmospheric pressure and boiling point

Understand the relationship between atmospheric pressure and human life

Is there a way you can use atmospheric pressure to "suck" two plastic coat hooks together?

space suit

There is no air in space, so astronauts have to wear special spacesuits to take off. The spacesuit can function as a "miniature atmosphere", providing astronauts with pure oxygen, air pressure, and regulating temperature. The early spacesuits used during the moon landings have now evolved into complex manned mobility devices.

1. The influence of atmospheric pressure on weather

1. Atmospheric pressure changes with altitude, area, and time.

2. High pressure area: an area with high air pressure.

The air flows from top to bottom and the weather is clear and dry.

3. Low pressure area: an area with low air pressure.

The air flows from bottom to top and the weather is rainy and cloudy.

4. The air pressure is higher on sunny days than on cloudy days, and the air pressure is higher in winter than in summer.

Consolidation exercises

1. Among the following equipment, the phenomenon of atmospheric pressure is applied: ( )

A. Piston air extractor B. Pressure gauge

C. Pump D. Thermometer

2. In an experiment to observe the boiling of water, it was found that the thermometer's reading was always lower than 100°C. This was due to ( )

A. It may be that the temperature is low

B. Heating time is not long enough

C. The air pressure is lower than the standard air pressure

D. The air pressure is higher than the standard air pressure

3. Among the following statements, which one is incorrect ( )

A. Generally, the air pressure is higher on sunny days than on rainy days.

B. The air pressure in Lhasa is higher than that in Shanghai

C. Within an altitude of 2,000 meters, for every 12 meters of elevation, the atmospheric pressure decreases by 1 mm of mercury.

D. The boiling point of the liquid in the pressure cooker will increase

4. Use a pressure cooker to cook food faster because: ( )

A. High pressure and low boiling point

B. Small air pressure and low boiling point

C. High pressure and high boiling point

D. Low air pressure and high boiling point

Operation

Homework

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What is buoyancy and in what direction?

How is buoyancy generated? How to measure the buoyant force on an object?

What factors are related to the size of buoyancy?

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"Atmospheric Pressure and Human Life" Magical Pressure PPT Courseware 2:

"Atmospheric Pressure and Human Life" Magical Pressure PPT Courseware 2 Question: Is there pressure inside the atmosphere around the earth? Demonstration - taking coins, swallowing eggs from bottles, covering cups 1. Atmospheric pressure (strong): (1) Definition: The pressure of the atmosphere on objects immersed in it. (2)Production: air..

File Info

Update Time: 2024-10-03

This template belongs to Physics courseware Guangdong and Shanghai version of eighth grade physics volume 2 industry PPT template

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