"Temperature and Thermometer" Changes in Temperature and Water PPT

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"Temperature and Thermometer" Changes in Temperature and Water PPT

Part 1: Comparing hot and cold water

If there are two glasses of water, which one is hot? Which cup is cold? Can we feel it by touching it with our hands?

There are four cups on the table. Cup No. 1 contains cold water, cups No. 2 and 3 contain warm water, and cup No. 4 contains hot water. We first insert our two hands into cup No. 1 and cup No. 4 respectively and compare the water contents in the cups. Hot or cold, and then immediately insert both hands into cup No. 2 and cup No. 3 respectively to compare the hot and cold water in the cup.

If we first compare the hotness and coldness of the water in cups No. 2 and 3, and then compare the hotness and coldness of the water in cups No. 1 and 4, do we feel the same about the hotness and coldness of the four cups of water these two times? In fact, how hot or cold are these four glasses of water?

We use touch to feel how hot or cold an object is. Is it accurate? Is it reliable? How do people accurately know how hot or cold an object is?

The degree of hotness or coldness of an object is called temperature, usually expressed in degrees Celsius (℃).

Temperature and thermometer PPT, part 2: observing the thermometer

Look carefully at the construction of the thermometer, as well as the scales, markings, and numbers on it.

Observe the glass bulb at the lower end of the thermometer and the thin glass tube connected to the glass bulb. Do common thermometers have such a structure?

Things you need to know before using a thermometer:

1. Is this a Celsius thermometer? That is, is the unit of temperature in degrees Celsius?

2. How many degrees does each scale on the thermometer represent?

3. What are the highest and lowest temperatures it can measure?

Temperature and thermometer PPT, Part 3: Reading and writing of Celsius temperature

Writing 20℃

Reads as 20 degrees Celsius

Writing -8℃

Read as minus 8 degrees Celsius

Temperature and thermometer PPT, Part 4: Reading the temperature indicated by the thermometer

Which angle should we choose to observe the reading on the thermometer as the measured temperature?

The hot breath exhaled from the mouth can cause the liquid column in the thermometer to rise. How should we breathe when we get close to the thermometer to read the temperature?

When observing the temperature, the line of sight should be at the same level as the liquid level of the thermometer; all unfavorable factors that affect the accuracy of the temperature measurement should be eliminated as much as possible.

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For more information about the "Changes in Temperature and Water Temperature and Thermometer" PPT courseware, please click on the Changes in Temperature and Water PPT Temperature and Thermometer PPT tab.

"Temperature and Thermometer" PPT download of changes in temperature and water:

"Temperature and Thermometer" Changes in Temperature and Water PPT Download Part One: Introduction of New Knowledge Talk about it. Students, we feel very hot in summer and very cold in winter. What is the difference between these two seasons? ... ... ... Temperature and thermometer PPT..

"Temperature and Thermometer" Changes in Temperature and Water PPT Courseware 3:

"Temperature and Thermometer" Changes in Temperature and Water PPT Courseware 3 Scientific Concepts Temperature The hot or cold degree of an object is called temperature, usually expressed in degrees Celsius (℃). Teaching a new lesson 1. If there are two glasses of water, which one is hot and which one is cold? Can you tell the difference? 2..

"Temperature and Thermometer" Changes in Temperature and Water PPT Courseware 2:

"Temperature and Thermometer" Changes in Temperature and Water PPT Courseware 2 The degree of hotness and coldness of an object is called temperature. Observation Tips: Handle the thermometer carefully to prevent it from breaking! If the thermometer tube breaks, tell your teacher immediately! ... ... ... Methods of observing temperature: ..

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Update Time: 2024-11-01

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