"Information Age" Information Transmission PPT Courseware 2

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"Information Age" Information Transmission PPT Courseware 2

Why do people say we have entered the "information age"?

Think and discuss: When you encounter an emergency in the wild, what method will you use to send a distress signal?

Fireworks: Setting off fireworks is the most common way to call for help. To smoke during the day, put some rubber sheets, leaves, moss, ferns, etc. on the fire to generate smoke to notify the outside world. When using fire at night, three open fires should be lit on open ground toward possible residential areas, and the firelight should be used to convey distress signals.

Light signal: Use mirrors to use sunlight during the day to reflect intermittent light signals to possible residential areas or rescue aircraft in the air. The light signals can be transmitted up to 16 kilometers away. The method is to aim one finger at the place where it should be conveyed, hold the reflector with the other hand to adjust the reflected sunlight, and gradually direct the reflected light towards the aiming direction. Use a flashlight at night to continuously transmit distress signals in the direction of distress.

The internationally accepted distress signal is SOS, which is three long and three short, and it is a continuous cycle.

Modern rescue methods: With the development of the times, various modern rescue equipment have gradually become popular, such as beacons, radio communication machines, satellite phones and other equipment. If conditions permit, these modern equipment can be gradually equipped.

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For more information about the "Transmission of Information in the Information Age" PPT courseware, please click the "Transmission of Information PPT Information Age PPT" tab.

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Update Time: 2024-11-22

This template belongs to science courseware Hunan Education Edition Fourth Grade Science Volume 1 industry PPT template

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