"Why Bicycle Tires Burst" PPT

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"Why Bicycle Tires Burst" PPT

Part One: Questions and Answers

Please make bold assumptions before answering:

Under normal circumstances, liquids have the property of thermal expansion and contraction. Does air also have the characteristics of thermal expansion and contraction?

Experimental method 1

Place the bottle filled with air into hot water and observe and record the changes in the balloon.

Put the bottle filled with air into water at room temperature and observe the changes in the balloon.

Finally, put the bottle containing air into ice water and observe the changes of the balloon.

Experimental method 2

A drop of red ink is dropped into a curved glass tube. When it is cold, the red ink moves inward, and when it is heated, the red ink moves outward.

Why bicycle tires burst PPT, Part 2: Application of thermal expansion and contraction

Applications of thermal expansion and contraction in daily life:

1. Thermometer;

2. If a table tennis ball is deflated, it will recover by scalding it with boiling water;

3. Don’t pump your bicycle too much in summer;

4. The wires sag a lot in summer and become tight in winter;

5. There are gaps in the rails;

Please think about: Why do wires sag more in summer but become tighter in winter?

Please think about: Why does the cork of the thermos pop out on its own?

Keywords: Qingdao edition fourth grade science PPT courseware for the second volume free download, why bicycle tires burst PPT download, .PPT format;

For more information about the PPT courseware "Why Bicycle Tires Burst", please click on the Why Bicycle Tires Burst PPT tab.

"Why Bicycle Tires Burst" PPT download:

"Why Bicycle Tires Burst" PPT Download Part One: Classroom Experiment Independent Learning: Why do bicycle tires burst under sunlight? We already know that liquids expand with heat and contract with cold, but does air also expand with heat and contract with cold? In class...

"Why Bicycle Tires Burst" PPT courseware:

The first part of the PPT courseware "Why Bicycle Tires Burst": Explore the thermal expansion and contraction of gases Experimental equipment: solid thermal expansion and contraction instrument, alcohol lamp, matches, sink, cold water Experimental steps: First observe whether the copper ball can pass through the metal ring ; Use an alcohol lamp to heat the copper ball..

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Update Time: 2024-06-21

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

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