"Letters and Signs" Information Transmission PPT Courseware

Description

"Letters and Signs" Information Transmission PPT Courseware

The ancient Romans had known for a long time that pigeons had a homing instinct. During or at the end of sporting competitions, pigeons are usually released to celebrate and declare victory. Ancient Egyptian fishermen often brought pigeons with them every time they went fishing in order to convey distress signals and fishing flood news. Ovid (43 BC - 17 AD) described in a work that a man named Taurosthenes dyed a dove purple and released it, so that it flew back to the house of Zenna and prayed to the emperor. There his father reported that he had won the Olympic Games. In ancient times, there was a ruler in Baghdad in the Middle East, Sultan Noreddin Muhammad, who established a carrier pigeon communication network between Baghdad and cities in his empire, forming a famous carrier pigeon post office. African commercial fleets also put pigeons on ships as shipping assistants, and release pigeons from time to time to notify the arrival of ships on shore, etc.

【Experimental steps】

Use a dilute starch solution (rice soup) to write on white paper. When it dries, there will be no writing. Apply it with iodine water to reveal blue writing. Place it over a flame to bake, and the blue will fade away. This can be repeated several times.

【Experimental principle】

Use colorless test solution to write on white paper. After drying, the writing will not be visible. Then use a color reagent to treat it, and the written writing will be visible. For example: starch turns blue-purple when exposed to iodine, etc.

When you see this sign, it means that the road ahead is impassable or not allowed to pass, reminding you to stop and change to another route.

This is a big exclamation mark "!". It reminds the driver to drive carefully and observe the road conditions to achieve the purpose of reminding others to pay attention to safety.

Logo design principles

1. Clear and easy to understand;

2. The image is simple and the colors are simple;

3. Be aesthetically pleasing.

Logo design method steps

1. Topic selection: Determine the title, content and information to be expressed in the logo design.

2. Conception: How to highlight the characteristics of the logo design and what techniques to use to express it.

3. Composition: You can draw a few more sketches, think over and over again, look for a concise and general image, and clearly express the information; you can also use different techniques to express it to choose a suitable design solution.

4. Finalize: Choose the most ideal design for finalization.

5. Coloring: Use simple and bold colors, or use contrasting colors. Generally, only one or two colors are used to prevent clutter from affecting the effect.

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For more information about the "Transmission of Information Letters and Signs" PPT courseware, please click the "Transmission of Information ppt Letters and Signs ppt" tab.

"Letter and Signboard" Information Transmission PPT Courseware 2:

"Letters and Signs" Transmission of Information PPT Courseware 2 Can you receive information? Letters are a simple way to convey information. Can secret letters written in rice soup convey information? How do you decipher and receive the message? Do you recognize the common signs? The logo is a common letter...

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Update Time: 2024-09-30

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

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