"Water Can Dissolve Some Substances" Dissolution PPT Courseware 4

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"Water Can Dissolve Some Substances" Dissolution PPT Courseware 4

1. What is dissolution?

2. Can you say a sentence or two using dissolution?

Table salt in water...

Experimental equipment: beaker, spoon, glass rod, salt, water

1. Take a level spoonful of salt and place it in the water in the beaker and observe.

2. Stir gently for a few times and observe.

3. Stir for a while, let it sit, and observe.

1. Put the flour in water and observe: compare with sand + water and compare with salt + water

I would like to ask: is it more like the former or the latter?

2. Then stir and observe: compare with sand + water, compare with salt + water

I would like to ask: is it more like the former or the latter?

3. After letting it stand for a while, observe: compare with sand + water, compare with salt + water

I would like to ask: is it more like the former or the latter?

Filtration experiment

1. Fold the filter paper in half twice, open it along one edge and put it into the funnel.

2. Place the nozzle at the lower end of the funnel close to the inner wall of the beaker.

3. Slightly tilt the glass rod, with one end facing the three layers of filter paper, and slowly guide the liquid along the glass rod into the funnel.

Dissolve

1. No particles can be seen in the water

Evenly distributed in water

2. No precipitation

Cannot be separated by filtration

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"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 3:

"Water Can Dissolve Some Substances" Dissolution PPT Courseware 3 Activity 1: Observation experiment on whether salt and sand can be dissolved by water Experimental equipment: beaker, water, glass rod, salt, sand Experimental steps: 1. Observe the salt and sand with the naked eye. Describe their characteristics. ..

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Update Time: 2024-11-24

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

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