"Changes of rice, starch and iodine" PPT on changes in substances

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"Changes of rice, starch and iodine" PPT on changes in substances

Part One: Rice that goes stale

Take a bite of rice, what does the rice taste like?

How do you feel when you chew it for a while? When sweetness appears, swallow the rice.

What does it mean when rice tastes sweet?

Can you experience the sweetness by chewing the outer shell of the steamed bun?

Is the rice sweet?

When you put the sugar in your mouth, you can taste the sweetness immediately. However, after a long time, it doesn't feel so sweet anymore.

If the rice is sweet, you should taste sweetness initially. But it takes a period of chewing before the sweetness appears, and it becomes sweeter slowly.

It turns out that there is something called starch in rice, which changes during our chewing process and becomes sweet. Therefore, the rice, which was not sweet at first, gradually became sweet.

Changes in rice starch and iodine PPT, part 2: rice, starch and iodine

What happens when you put a drop of iodine on rice?

The main ingredient in rice is starch. Starch is a common cooking ingredient in the kitchen. Let’s take a look at starch.

Drop iodine on the starch and observe what happens.

When rice and starch encounter iodine, their color changes. This blue substance is a new substance different from rice and starch.

PPT on changes in rice starch and iodine, part three: looking for traces of starch

Using the characteristic that the color of starch changes when it reacts with iodine, we can test whether some foods contain starch.

Foods rich in starch include rice, corn, wheat, etc. Root vegetables include potatoes, yams, potatoes, etc. In addition, various beans and bananas and other starchy fruits are also included in starchy foods.

Changes in rice starch and iodine PPT, Part 4: Making mysterious letters

Use a brush dipped in a liquid prepared from starch to write a few words on a white paper. After drying, give it to your classmates and ask them to think of ways to make the words appear on the white paper.

Spray iodine evenly on the white paper. The starch will turn blue when it encounters iodine. After a while, blue words will appear on the white paper.

Keywords: Free download of science PPT courseware for the second volume of the sixth grade in the textbook version, PPT download of changes in rice starch and iodine, PPT download of changes in substances, .PPT format;

For more information about the PPT courseware "Changes in Substances: Changes in Rice Starch and Iodine", please click on the Changes in Substances ppt: Changes in Rice Starch and Iodine ppt tab.

"Changes of Rice, Starch and Iodine" PPT download of changes in substances:

"Changes of Rice, Starch and Iodine" Changes in Substances PPT Download Part One: Exploration of New Lessons (1) Rice that changes flavor Discussion: Take a bite of rice and talk about what the rice tastes like? How do you feel when you chew it for a while? When sweetness appears...

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Update Time: 2024-11-22

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 2 industry PPT template

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