"Material Around Us" Material Changes PPT Courseware 2

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Science Edition for Sixth Grade Science Volume 2	pptx	6 MB

"Material Around Us" Material Changes PPT Courseware 2

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Upload Time: 2024-10-20

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"Material Around Us" Material Changes PPT Courseware 2

substance

Books, erasers, tables, lights, running water...

Air, electricity, fire, sound...

In fact, the actual things that we can directly or indirectly observe are matter, and the entire world is made of matter.

Gods, demons, ghosts, thoughts, are these substances? Why?

Changes that only change the shape, size, and state of matter without producing new matter are called physical changes.

When substances change, new substances are produced, which is called chemical changes.

Accompanying phenomena: light and heat, color change, gas generation, precipitation, etc.

What are the similarities and differences between the changes that occur when a match burns and the changes that occur when a log breaks?

Answer: The same point: the shape changes.

Difference: Matches produce other substances when burned, while firewood does not.

Matter is changing

1. When cooking, rice becomes rice;

2. When writing, handwriting is left on the paper;

3. After it rains, the accumulated water on the road slowly turns into water vapor and disappears into the air;

What changes occur to rocks in nature?

Answer: Rocks in nature will weather under long-term natural effects. Specific manifestations include changes in size, shape, composition, etc.

Why is it said that one cannot step into the same river twice?

The world is always changing. Some changes just change the shape and size of matter, and some changes produce new matter.

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For more information about the "Changes of Matter, Material Around Us" PPT courseware, please click on the "Change of Matter ppt, Material Around Us" ppt tag.

"Material Around Us" PPT teaching courseware on changes in matter:

"Material Around Us" PPT teaching courseware on the change of matter Part 1: Matter is changing When cooking, rice becomes rice. When I write, I leave traces on the paper. After it rains, the accumulated water on the road slowly turns into water vapor and disappears into the air. since..

"Material Around Us" PPT download of changes in matter:

"Material Around Us" Changes in Matter PPT Download Part One: New Lesson Learning (1) What materials are around us? Are air, electricity, fire, and sound all matter? Air is a mixture of nitrogen, oxygen, carbon dioxide and other gases, and is a substance. ..

"Material Around Us" Changes in Matter PPT:

"Materials Around Us" Changes in Matter PPT Part 1 Content: The world is made of matter What materials are around us? The world is made of matter. The books, erasers, tables, lights, running water, houses, trees, animals, and plants around us include...

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Update Time: 2024-10-20

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"Material Around Us" Material Changes PPT Courseware 2