"Temperature" Changes in State of Matter PPT Courseware 10

Description

"Temperature" Changes in State of Matter PPT Courseware 10

temperature

Definition: The degree of hotness or coldness of an object is called temperature.

give it a try

As shown in the picture above, put both hands into hot water and cold water respectively.

After a while, put both hands into warm water at the same time. Do both hands feel the same way about "warm water"?

Tool for measuring temperature - thermometer

Make your own thermometer: Fill a small bottle with colored water. Equip the vial with a rubber stopper, insert a thin glass tube into the rubber stopper, and plug the mouth of the bottle with the rubber stopper.

Phenomenon: When the temperature rises, the liquid expands when heated, and the liquid level in the glass tube rises; otherwise, the temperature drops.

temperature measurement

The principle of a thermometer: thermal expansion and contraction of liquids.

Liquids in the thermometer: alcohol, mercury, kerosene.

Common types of thermometers:

A: Laboratory thermometer,

B: Thermometer,

C: Cold and heat table.

Celsius

The symbol on the thermometer: ℃ represents the temperature in Celsius.

Celsius temperature is specified as follows:

The temperature of the ice-water mixture at standard atmospheric pressure - 0°C,

The temperature of boiling water at standard atmospheric pressure - 100°C;

Use of thermometer

Before measuring temperature:

1. To understand its range, that is, the range of temperature that the thermometer can measure.

2. It is necessary to recognize its zero mark, which is the position of zero degrees Celsius.

3. It is necessary to recognize its graduation value, that is, the temperature value represented by a small grid.

When measuring temperature please note:

1. The glass bulb of the thermometer should be completely immersed in the liquid being measured and should not touch the bottom or wall of the container.

2. After the glass bulb of the thermometer is immersed in the liquid to be measured, wait for a while until the thermometer's reading stabilizes before taking a reading.

3. When reading, the glass bulb of the thermometer should remain in the liquid, and the line of sight should be level with the liquid surface of the liquid column in the thermometer.

thermometer

Thermometer is used to measure human body temperature. According to the changes in human body temperature, the scale range of the thermometer is usually 35 ~ 42 ℃.

think:

Why can a thermometer take readings after leaving the human body?

Practice in class

1. As shown in Figure 1, the thermometer reads _____℃.

2. As shown in Figure 2, the thermometer reads _____℃.

3. Liquid thermometers are made based on the laws of liquid __________.

4. As shown in Figure 3, the thermometer reads _____℃.

5. As shown in Figure 4, there are four operations for measuring water temperature: A, B, C, and D. The correct one is ( )

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For more information about the PPT courseware "Temperature of Changes in State of Matter", please click on the "Change of State of Matter ppt Temperature ppt" tab.

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Update Time: 2024-07-02

This template belongs to Physics courseware Lu Jiao Edition Ninth Grade Physics Volume 2 industry PPT template

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