"What changes have occurred in matter" Changes in matter PPT courseware 4

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"What changes have occurred in matter" Changes in matter PPT courseware 4

Safety Tips:

Put less sugar.

Since the temperature of the spoon is higher during heating, hold the top of the spoon;

Be careful not to put your eyes too close to the spoon

Do not touch the heated part with your hands after heating is completed;

Use multiple senses to observe changes in sugar and keep records.

A. Sugar melts and becomes liquid.

B. The color first turns yellow, bubbling, fragrant, smoky and bubbling; the color turns to coffee color, dark coffee, and finally close to black with a pasty smell.

Some changes only change the shape, volume, state, etc. of matter, but do not produce new matter that is different from the original. We call such changes physical changes.

Some changes produce new substances. We call changes that produce new substances chemical changes.

What changes did you notice when observing the changes in sugar when heated?

Phenomenon:

During the heating process of white sugar, it will first undergo a physical change, that is, the solid white sugar turns into liquid white sugar when heated. Then, as the heating continues, the color of the white sugar gradually deepens until it is completely carbonized and a burnt smell can be smelled. A chemical change has occurred. If you continue to heat, the black charcoal will still burn.

practise:

Determine whether the following changes are physical changes or chemical changes

① Grind the iron block into iron powder. Physical changes

③ Put wet clothes in the sun and dry them. Physical changes

④Iron melts into molten iron at high temperature. Physical changes

⑤Coal combustion chemical changes

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"What Changes Happened to Matter" PPT teaching courseware on changes in matter:

"What changes have occurred in matter" PPT teaching courseware on changes in matter Part 1: Review: What changes have you observed? Changes that only change the state, shape, size, etc. of matter without producing new matter are called physical changes. New substances are generated...

Download PPT "What Changes Happened to Matter": Changes in Matter:

"What Changes Have Happened to Matter" Changes in Matter PPT Download Part One Content: New Lesson Exploration (1) Observing Sand and Beans Experimental Conclusion: The characteristics and properties of beans and sand have not changed, sand is still sand, and beans are still beans. That is, the matter does not change. observe..

"What changes have occurred in matter" Changes in matter PPT:

"What happened to matter?" Changes in matter PPT Part 1: Mixing sand and beans Pour the sand and beans on the white paper, observe and describe their characteristics. Pour the sand in the cup into the cup with beans and mix and stir. In the mixture of sand and beans..

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Update Time: 2024-11-24

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

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