"Where Has the Sugar Gone" Drinking Water PPT Courseware 2

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"Where Has the Sugar Gone" Drinking Water PPT Courseware 2

Once upon a time, there was a little donkey carrying a bag of sugar across a river. The river was very deep and the sugar was submerged. After it crossed the river, it felt much lighter.

What is the reason for this?

Guess: What happens to the sugar in the water?

First come up with your own conjecture, and then think of ways to conduct experiments and research.

experiment one):

1. Take a spoonful of sugar and sand respectively, put them into two beakers containing the same amount of water, and observe their changes in the water.

2. Stir and observe the changes of sugar and sand in the water.

3. Let it sit for a while and observe the changes of sugar and sand in the water.

Experimental requirements:

1. Teams of four work together.

2. The experiment should be conducted quietly and quickly.

3. Complete the experiment record sheet.

Activity 3 Potassium permanganate

Gently put a small amount of potassium permanganate into a glass of water and watch carefully what happens.

Stir it gently with chopsticks and continue to observe and describe the changes in potassium permanganate.

Please think and analyze this activity!

Describe the change process of potassium permanganate in water.

Potassium permanganate is purple-black granular. When placed in water, it will slowly spread into the water and turn into particles invisible to the naked eye. There are purple-red cloud-like objects around the potassium permanganate particles in the water. The color of the water slowly changed from colorless to purple. After stirring, you can see the purple-red clouds spreading in all directions of the water, evenly distributed in the water without settling. Finally, the glass of water turned purple-red. .

Experiment 2: Explore whether five-spice powder, chalk, sand, salt, and monosodium glutamate can be dissolved in water

1. Put two spoons of the given items into the water, stir them with chopsticks, and observe the changes of the items in the water.

2. Let it sit for a while and then observe what you see.

3. Team members cooperate with each other, observe carefully, keep their voices as low as possible during the experiment, and write down the observed experimental phenomena on the record sheet.

4. After the experiment is completed, sit upright quickly and do not talk nonsense.

Through experiments, which objects dissolve in water and which objects do not dissolve in water?

Dissolve in water: sugar, potassium permanganate, salt, MSG

Insoluble in water: sand flour chalk dust

What are the characteristics of dissolution?

Spread slowly around;

into particles;

Evenly dispersed in water without settling.

Activity 3 (Experimental Challenge)

Discussion: How to make a sugar cube dissolve in water as quickly as possible?

How to make a sugar cube dissolve in water as quickly as possible:

1. Stir with chopsticks.

2. Dissolve in hot water.

3. Grind the sugar cubes.

4. Use the above methods at the same time.

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For more information about the PPT courseware "Where Did the Sugar Go in the Drinking Water?", please click the "Where Did the Sugar Go in the Drinking Water ppt" ppt tag.

"Where Has the Sugar Gone" Drinking Water PPT Courseware 3:

"Where Has the Sugar Gone?" Drinking Water PPT Courseware 3 Teaching Materials (Status and Function) "Where Has the Sugar Gone" is the content of Lesson 13 of the "Drinking Water" unit in the first volume of the third-grade science textbook published by the Hubei Education Press. Through experiments, this lesson aims to guide students to know that water can dissolve some substances.

"Where Has the Sugar Gone" Drinking Water PPT Courseware:

"Where Has the Sugar Gone" Drinking Water PPT Courseware 1. Do you know them? 2. How can you accurately distinguish between sugar and salt? 3. What will happen if you put sugar in water? Experimental steps: 1. First pour half a cup of water into the beaker, then take a small amount of brown sugar (potassium permanganate) and put it...

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Update Time: 2024-09-06

This template belongs to science courseware E-education edition third grade science volume 1 industry PPT template

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