"Temperature" Changes in State of Matter PPT Courseware 3

Description

"Temperature" Changes in State of Matter PPT Courseware 3

learning target

1. Understand how a thermometer works.

2. Understand the common temperature values ​​in the living environment.

3. Can use a thermometer to measure temperature.

Think about it:

First put the device into hot water and found ______.

Then put the device into cold water and found ______.

Think and discuss:

What is the reason for the rise and fall of the red liquid column?

Explain what properties the liquid has?

How to read temperature

The normal human body temperature (oral temperature) is "37°C", pronounced "37°C";

The average temperature in Beijing in January is "-4.7℃", which is pronounced as "minus 4.7℃" or "minus 4.7℃".

Use of thermometer

When using a thermometer, you must first clearly see its range, graduation value, and zero mark.

Range: the temperature range of the lowest temperature and the highest temperature that can be measured.

Graduation value: The value represented by the smallest division.

How to use a thermometer

See: see clearly its ______, ______, ______.

Place: 1. The glass bulb of the thermometer should be ______ in the liquid being measured, and should not touch ______ or ______

Reading: 2. Wait for a while after the glass bulb of the thermometer is immersed in the liquid to be measured, and wait for the thermometer to read ______ before reading;

3. When reading, the glass bulb of the thermometer should be ______ in the liquid being measured; the line of sight should be level with ______ in the thermometer.

Apply what you learn:

1. A thermometer measures one person's body temperature to be 38.5 ℃, and then measures the temperature of another person without turning it off. If the other person's actual body temperature is 37 ℃, then the measurement result is __________℃.

If the person's actual body temperature is 39.2°C, the measured result is __________°C.

2. Why are the glass tubes of some thermometers made into a prism shape? It plays a role in amplifying the liquid column.

3. Why does the glass bulb of the thermometer have a large volume and the inner tube is very thin? In order to make the reading more accurate

practise:

1. Temperature is a physical quantity that represents ________. Commonly used thermometers measure temperature based on the properties of _______. The letter C on the thermometer indicates that _______ is used, which stipulates the temperature of ______ at 1 standard atmosphere as 0 ℃, the temperature of ______ at 1 standard atmosphere is defined as 100℃.

2. The normal human body temperature (oral temperature) is approximately ______, pronounced ______.

3． The measuring range of the thermometer is ___________, and the graduation value is ______.

4. The correct pronunciation of -20℃ is [ ]

A. Minus 20 degrees Celsius B. minus 20 degrees Celsius

C. Negative 20 degrees Celsius D. minus 20 degrees Celsius

Summary: What did you learn in this lesson?

1.Temperature

Definition: How hot or cold an object is.

Unit: Celsius ℃

Measuring Tool: Thermometer

2. Celsius temperature regulations:

3. Thermometer

Principle: The law of thermal expansion and contraction of liquids

Structure: glass shell, capillary tube, glass bubble, liquid, scale and symbols

Instructions:

4. Thermometer

Structural features: shrinkage

Instructions for use: Shake down hard before use

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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: 2024-11-19

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

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