"The Changing Salt" PPT

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"The Changing Salt" PPT

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Hunan Education Edition Fourth Grade Science Volume 2, Changing Salt PPT

Part One: Test You

test you

Can you find salt dissolved in water?

Experimental steps:

① Place the asbestos net on the tripod and the evaporating dish on the asbestos net.

②Pour a small amount of salt water into the evaporating dish, light the alcohol lamp and move it under the tripod

③Quietly observe the changes in the salt water in the evaporating dish, and record the phenomena in the experimental record sheet.

④ Remove the alcohol lamp and cover it from the side.

Precautions

1. Do not touch equipment that is being heated or that has not cooled down after heating;

2. Use the alcohol lamp correctly. When the water is almost dry, remove the alcohol lamp and extinguish the flame.

The ever-changing salt PPT, part two: summary

Salt can be dissolved in water and extracted from water. This change process is reversible.

Keywords: Hunan Education Edition fourth grade science PPT courseware for the second volume free download, Changing Salt PPT download, .PPT format;

For more information about the "Changing Salt" PPT courseware, please click on the "Changing Salt" PPT tab.

"Changing Salt" PPT download:

The first part of the science of the second volume of the fourth grade of the Hunan Education Edition, the changing salt PPT courseware: Test you. Can you retrieve the salt dissolved in the water? Use the provided equipment to design an experiment to extract the salt dissolved in the water. . Experimental steps: ①Place the asbestos net on a tripod..

"Changing Salt" PPT courseware:

Hunan Education Edition fourth grade science volume 2, Changing Salt PPT courseware Part 1 content: Learning objectives: 1. Know what kind of change process is a reversible change process. 2. Know what kind of change process is an irreversible change process. 3. Know that boiling the sea into salt is what people think of...

File Info

Update Time: 2024-09-30

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