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Authoritative PPT Summary
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;
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"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...