"Water Can Dissolve Some Substances" Dissolution PPT Courseware 2

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"Water Can Dissolve Some Substances" Dissolution PPT Courseware 2

What can I pretend to be dissatisfied with?

What can be put in a cup that is almost full of water, but not filled with water? A small glass of water? A small cup of sand? A small cup of cane sugar?

Experimental equipment: beaker, small spoon, small stick, salt, water

1. Observe the appearance of table salt

2. Take a level spoonful of salt, place it in the water in the beaker (let it stand) and observe.

3. Stir gently for a few times and observe.

4. After letting it sit for a while, does the water change?

5. Finally, draw a picture of what table salt looks like in water...

Initial feelings of dissolution:

Dissolve - When put into water like table salt, it becomes smaller and evenly dispersed in the water, turning into invisible particles.

Experimental equipment: beaker, small spoon, small stick, sand, flour, water

1. Observe the appearance of sand and flour

2. Take a level spoonful of sand and flour, put it in the water in the beaker (let it stand) and observe.

3. Stir gently for a few times and observe.

4. After letting it sit for a while, does the water change?

5. Finally, draw the appearance of sand and flour in water...

Feel the dissolution again:

Like sand, after being left for a period of time, the insoluble matter can separate from the water. The water will be in the upper layer and the insoluble matter will settle in the lower layer - the sand cannot be dissolved.

Substances like table salt that disperse evenly in water and do not precipitate on their own - table salt can dissolve.

Summary - Dissolve

1. Materials are dispersed evenly.

2. It will not precipitate after standing.

(Precipitation)

3. Substances cannot be separated after filtration.

(filtration method)

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For more information about the "Dissolved Water Can Dissolve Some Substances" PPT courseware, please click the Dissolved ppt Water Can Dissolve Some Substances ppt label.

"Water Can Dissolve Some Substances" Dissolution PPT Download:

"Water Can Dissolve Some Substances" Dissolution PPT Download Part 1 content: Table salt dissolved in water 1. Observe and describe the state of table salt in water Experimental equipment: beaker, small spoon, glass rod, table salt, water 1. Take a level spoon of salt, Place it in a beaker of water and observe. 2,..

"Water can dissolve some substances" Dissolution PPT:

"Water Can Dissolve Some Substances" Dissolution PPT Part 1 Content: Table salt is dissolved in water. Take a small spoonful of table salt, put it into a glass filled with water, and stir gently with a stirring rod. How to describe the state of table salt in water? Table salt is missing in the water. Table salt is missing in the water..

"Water Can Dissolve Some Substances" Dissolution PPT Courseware 4:

"Water Can Dissolve Some Substances" Dissolution PPT Courseware 4 1. What is dissolution? 2. Can you say a sentence or two using dissolution? Salt in water Experimental equipment: beaker, small spoon, glass rod, salt, water 1. Take a level spoon of salt and place it in the water in the beaker for observation. 2. Gently...

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Update Time: 2024-09-30

This template belongs to science courseware Fourth Grade Science Volume 1, Textbook Edition industry PPT template

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