"Thermal Expansion and Cold Contraction" Changes in Matter PPT Courseware 3

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People's Education Press Fifth Grade Science Volume 2	pptx	6 MB

"Thermal Expansion and Cold Contraction" Changes in Matter PPT Courseware 3

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Upload Time: 2024-10-20

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Description

"Thermal Expansion and Cold Contraction" Changes in Matter PPT Courseware 3

Why are the rails not tightly connected?

Why do cement pavements have many seams cut out?

Why do power lines get loose in the summer?

Self-test

Expand your thinking

The girl in the picture on the right wants to take off the cap of the bottle in her hand, but she can't unscrew it. Can you think of a way to help her?

Class summary

Thermal expansion and contraction are a basic property of objects. Under normal conditions, objects will expand when heated and shrink when cooled. All objects have this property.

Objects all have the phenomenon of thermal expansion and contraction. We can use this phenomenon to solve some problems in our daily life.

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For more information about the PPT courseware "Changes of Matter Thermal Expansion and Contraction", please click on the Changes of Matter ppt Thermal Expansion and Contraction ppt tag.

"Does Metal Expand and Contract with Heat?" Hot PPT download:

"Does Metal Expand and Contract with Heat?" Hot PPT Download Part One: Experimental Research Take a copper ball as an example to observe whether metal has the property of thermal expansion and contraction. Observe the thermal expansion and contraction of the copper ball. Experiment name: Does the copper ball expand and contract with heat? Experimental equipment: Alcohol lamp, copper ball thermal expansion and contraction...

"Does Metal Expand and Contract with Heat?" Hot PPT:

"Does Metal Expand and Contract with Heat?" Thermal PPT Part 1: Observe the thermal expansion and contraction of copper balls. Do experiments to observe the thermal expansion and contraction of copper balls. 1. Pay attention to the safety of using alcohol lamp; 2. Do not touch the copper ball. The heated copper ball will burn the skin. Describe the experimental process and what you saw...

"Thermal Expansion and Contraction of Air" thermal PPT download:

"Thermal Expansion and Contraction of Air" Hot PPT Download Part One: Exploring New Knowledge Observing whether the air expands and contracts with heat. Hypothesis: Air has the property of thermal expansion and contraction. If the volume of the air inside the bottle expands, the air inside the bottle will be squeezed out. Just find a way to observe inside the bottle...

File Info

Update Time: 2024-10-20

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Changes in matter ppt Thermal expansion and contraction ppt

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"Thermal Expansion and Cold Contraction" Changes in Matter PPT Courseware 3