"Do They Generate Heat" PPT download

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"Do They Generate Heat" PPT download

Part One: Learning Objectives

1. Know that various materials used in life do not generate heat, but can only retain heat; know that the thermal insulation properties of different materials are different.

2. Dare to make bold conjectures and verify your conjectures, and learn to draw conclusions through comparison and induction.

Kind tips

① Record the initial temperature of the thermometer

② Wrap the thermometer’s bubble with fur, sponge, and cotton respectively. Do not touch the thermometer’s bubble with your hands when wrapping. Tie it up quickly with rubber bands.

③ Hang up the wrapped thermometer.

④ When reading, the line of sight should be level with the liquid level of the thermometer.

⑤ Record readings at 1, 3, and 6 minutes.

Part 2: How to measure water temperature

Hold the top of the thermometer in your hand.

Immerse the lower end of the thermometer in the water without touching the bottom or wall of the container.

When reading, your line of sight should be level with the liquid level of the thermometer.

Read when the liquid column no longer rises or falls.

The thermometer cannot leave the water being measured when reading.

Tips: Thermal underwear for Antarctic scientific researchers

Antarctica is the coldest continent on earth, with an average annual temperature of minus 25°C and a minimum temperature of minus 88.3°C.

The thermal underwear used by the scientific expedition team members in the Antarctic expedition is specially made based on the Nuanka thermal underwear. This new thermal fiber has a warmth retention rate of 21% higher than that of cashmere, a perspiration and moisture conductivity that is 15% higher than that of cotton, and a breathability that is 10% higher than that of cotton. It has initially achieved both warmth retention and perspiration.

Part 3: After-class exercises

little judge

1. Neither cotton nor fur generates heat. It is only because of their good thermal insulation properties that people mistakenly think that they generate heat. ( )

2. The materials are the same and the thermal insulation performance is the same. ( )

I'll choose

1. People often say that cotton is not as warm as leather, which means ( )

A Cotton is not as good at insulating as fur B Cotton is not as good at generating heat as fur

2. The following materials with good thermal insulation properties are ( )

A metal B plastic foam

Keywords: Qingdao version of fourth grade science PPT courseware for the second volume free download, do they generate heat PPT courseware, .PPT format;

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"Do They Generate Heat" PPT courseware:

"Do They Generate Heat" PPT Courseware Part One: Exploration Activity 1 Do They Generate Heat? How to use a thermometer: Hold the upper part of the thermometer; when reading, keep your sight level with the liquid column of the thermometer; read the temperature when the liquid column no longer rises or falls. ..

"Do They Generate Heat" PPT:

"Do They Generate Heat" PPT Part One Content: Activity 1: Thermal Insulation Performance of Objects Think about why covering yourself with quilts and cotton-padded clothes makes you warm? Exploration Activity 1 Do they generate heat? Experimental Notes 1. Division of labor, cooperation, and careful observation. 2. Record the initial temperature of the thermometer..

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Update Time: 2024-06-26

This template belongs to science courseware Qingdao Edition Fourth Grade Science Volume 2 industry PPT template

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