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Qingdao Edition Fourth Grade Science Volume 2	pptx	6 MB

"The Secret of the Thermometer" PPT

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Upload Time: 2024-11-19

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"The Secret of the Thermometer" PPT

Part One: Measuring Temperature with a Thermometer

Why can a thermometer measure temperature?

Observe the structure of the thermometer

1. Tell me what the thermometer you observe looks like. Point with one finger: glass tube, glass bubble, liquid, liquid column

2. Measure the water temperature and observe any changes in the liquid column?

3. What new knowledge do you have about thermometers now?

Why does the liquid column of the thermometer rise or fall with the temperature?

In general, liquids expand with heat and contract with cold.

Liquid thermometers are made based on the thermal expansion and contraction properties of liquids.

The secret of the thermometer PPT, part 2: expansion summary

space expansion

What phenomena have you seen in daily life that indicate that liquids expand with heat and contract with cold?

After-school development:

In the cold winter, water pipes often freeze and crack. What is going on?

Summarize

What did you learn in this lesson? What did you gain?

Keywords: Qingdao edition fourth grade science PPT courseware for the second volume free download, the secret of the thermometer PPT download, .PPT format;

For more information about the "Secrets of Thermometers" PPT courseware, please click on the "Secrets of Thermometers" ppt tab.

"The Secret of the Thermometer" PPT courseware:

The first part of the "Secrets of Thermometers" PPT courseware content: The structural unit of a thermometer. Scale glass tube, liquid column, glass bubble, also called bubble. Industrial thermometers are widely used in industrial production such as petroleum, chemical industry, metallurgy, textile, food, etc. The temperature measurement range is: - 80~650..

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Update Time: 2024-11-19

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"The Secret of the Thermometer" PPT