"Temperature" PPT courseware on changes in states of matter

Description

"Temperature" PPT courseware on changes in states of matter

1. Temperature (symbol: t)

Unit: Celsius (symbol: ℃)

Hot objects have a high temperature and cold objects have a low temperature.

In physics, the degree of hotness or coldness of an object is usually 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"?

2. 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.

Place the vial into hot water and observe the position of the water column in the thin tube;

Then put the vial into cold water and observe the position of the water column in the thin tube.

Discussion: What phenomena did you observe?

Think about it, on what basis does a homemade thermometer measure temperature?

Conclusion: Commonly used thermometers are made according to the law of thermal expansion and contraction of liquids.

3. Celsius temperature

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;

Divide into 100 equal parts between 0 ℃ and 100 ℃, each equal part represents 1 ℃.

4. 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.

5. 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 ℃.

Thinking: Why can a thermometer take readings after leaving the human body? Try to find the answer from the book.

summary:

1. What did you gain from studying this class?

2. What else do you want to know?

Classroom test:

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 ( )

Keywords: teaching courseware on changes in the state of matter, teaching courseware on temperature, download of the eighth grade physics PPT courseware of the People's Education Edition, download of the eighth grade physics slide courseware, download of the PPT courseware on changes in the state of matter, download of the temperature PPT courseware, .PPT format;

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.

Color thermometer style PPT histogram:

These are two colorful thermometer-style PPT histograms with very personalized designs. .PPTX format;..

"Temperature and Air Temperature" Weather PPT:

"Temperature and Air Temperature" Weather PPT Part One Content: 1. Measurement and Comparison of Indoor and Outdoor Temperatures What can be used to measure temperature? Thermometer Do you remember what you know about thermometers? Tell which parts of the thermometer the arrows point to? The use of a thermometer requires...

"Three State Changes of Water" PPT download of changes in temperature and water:

"Three State Changes of Water" Temperature and water changes PPT download Part 1: Introduction of new knowledge Do you still remember ice? Is it a solid, liquid, or gas? What about water? Now that we have solids and liquids, what is missing? Today we will learn about the three states of water...

File Info

Update Time: 2024-07-30

This template belongs to Physics courseware People's Education Edition Physics for Grade 8, Volume 1 industry PPT template

Preview