"Why Wear Cotton Clothes to Keep You Warm" PPT Courseware 3

Description

"Why Wear Cotton Clothes to Keep You Warm" PPT Courseware 3

Talk about it

How do the clothes we wear change when the weather gets colder?

think about it

Why do you feel warm when wearing sweaters and cotton-padded clothes? Start by guessing why, and then do some research.

Experimental exploration

My experiment 1:

my question:

When you feel warm when wearing sweaters and cotton-padded clothes, is it because they can generate heat?

My guess:

If you feel warm when wearing sweaters and cotton-padded clothes, it may be because they can generate heat.

My experimental process and methods:

Three thermometers, two of which are wrapped in sweaters and cloths, and the other thermometer is exposed to room temperature. After a few minutes, see if the readings of the three thermometers have changed.

Have the three thermometer readings changed? What does it mean?

My conclusion:

There is no change in the readings of the three thermometers, indicating that sweaters and cotton cannot generate heat.

Based on experiments, talk about why you feel warm when wearing sweaters and cotton-padded clothes.

My conclusion:

You will feel warm when you wear sweaters and cotton-padded clothes because sweaters and cotton-padded clothes have the function of insulating heat, which can not only prevent the body's existing heat from escaping, but also prevent the cold air from outside from entering. The insulation effects of sweaters and cotton-padded clothes are also different.

Class exercises

1. Why do you feel warm when wearing sweaters and cotton-padded clothes?

Answer: You will feel warm when you wear sweaters and cotton-padded clothes because sweaters and cotton-padded clothes have the function of insulating heat. They can not only prevent the body's existing heat from escaping, but also prevent the cold air from outside from entering.

2. In production and life, where is thermal insulation (or heat insulation) used?

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For more information about the PPT courseware "Why Wear Cotton Clothes to Keep You Warm", please click on the Why Wear Cotton Clothes to Keep You Warm ppt tag.

"Why Wearing Cotton Clothes Keeps You Warm" PPT Courseware 2:

"Why Wear Cotton Clothes to Keep You Warm" PPT Courseware 2 What happens to the clothes we wear when the weather gets colder? The weather is cold, why do we wear cotton clothes? The reading of the thermometer after wrapping it in cotton clothing (℃): Room temperature (℃): The correct way to use the thermometer: Hand...

"Why Wear Cotton Clothes to Keep You Warm" PPT courseware:

"Why Wear Cotton Clothes to Keep You Warm" PPT courseware How to use a thermometer: 1. Hold the upper end of the thermometer with your hand. 2. When reading the thermometer, keep your eyes level with the scale. 3. When the thermometer is extended into the water, the bubbles cannot touch the wall and bottom of the cup. Experimental conclusion: Sweaters and cotton-padded clothes are not...

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Update Time: 2024-11-10

This template belongs to science courseware E-education edition third grade science volume 2 industry PPT template

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