"Phenomena Accompanying Chemical Changes" Changes in Matter PPT Courseware 2

Description

"Phenomena Accompanying Chemical Changes" Changes in Matter PPT Courseware 2

There are many phenomena that can help us determine whether a substance has undergone chemical changes.

Chemical changes are generally accompanied by

With what phenomena?

There are many chemical changes going on around us. The chemical change process of substances is often accompanied by various phenomena. Although the phenomena are different, they can be summarized as follows.

1. Change color

2. Light and heat

3. Generate gas

4. Produce sediment

Observed phenomena:

There is a red substance attached to the surface of the iron nail immersed in the solution.

When a candle burns and a light bulb turns on, they both emit light and heat. Are they both chemical changes?

There is gas production in both pictures, are they both chemical changes?

True or False

1. Chemical changes in substances must be accompanied by the phenomenon of luminescence and heat. ( )

2. When substances undergo chemical changes, new substances must be generated. ( )

3. The change in the generated gas must be a chemical change. ( )

4. Iron rusting is a physical change. ( )

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For more information about the PPT courseware "Phenomena Accompanying Chemical Changes in Changes in Matter", please click on the PPT tag "Phenomena Accompanying Chemical Changes ppt Changes in Matter".

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"Phenomena Accompanying Chemical Changes" Changes in Matter PPT Courseware 3:

"Phenomena Accompanying Chemical Changes" Changes in Matter PPT Courseware 3 Review Iron rusting is a chemical change, and rust is a new substance different from iron. Iron rust is related to water and air. There are many phenomena that can help us determine whether a substance has undergone chemical changes. ..

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"Phenomena Accompanying Chemical Changes" PPT courseware on changes in matter. There are many phenomena that can help us judge whether a substance has undergone chemical changes. What phenomena are generally accompanied by chemical changes? Phenomenon we observed: There is red (reddish brown) substance on the iron nails..

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Update Time: 2024-10-20

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 2 industry PPT template

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