Fifth Grade Science Volume 1, Textbook Edition
Science Edition for Sixth Grade Science Volume 2
Third Grade Science Volume 2, Textbook Edition
Science Edition for Sixth Grade Science Volume 1
Third Grade Science Volume 1, Textbook Edition
Fourth Grade Science Volume 2, Textbook Edition
Fourth Grade Science Volume 1, Textbook Edition
Qingdao Edition Fourth Grade Science Volume 2
Hunan Education Edition Fourth Grade Science Volume 1
E-education edition fifth grade science volume 1
E-education edition fifth grade science volume 2
Qingdao Edition Fifth Grade Science Volume 2
Fourth-grade science volume 2 of the E-education edition
Fifth Grade Science Volume 2, Textbook Edition
Zhejiang Education Edition Seventh Grade Science Volume 2
E-education edition third grade science volume 2
!["Changes in Rice, Starch and Iodine" Changes in Substances PPT Courseware 4](http://daogebangong.oss-cn-beijing.aliyuncs.com/ppt/preview/1/f4896cab-fb65-47c3-8a8b-9d7b20ecdc4c.webp)
Category | Format | Size |
---|---|---|
Science Edition for Sixth Grade Science Volume 2 | pptx | 6 MB |
Description
"Changes in Rice, Starch and Iodine" Changes in Substances PPT Courseware 4
Activity 1: Taste rice
Tasting tasks:
1. Don’t chew when you first taste it. Does the rice have any original taste?
2. Then chew it repeatedly for about 1-2 minutes. Feel any changes in the taste of the rice?
Thoughts after tasting:
Is rice actually sweet? If the sweetness in rice comes from chewing, what has happened to it?
Activity 2: Observe starch
Starch, also called cornstarch, is a common cooking item in the kitchen.
Experiment 1: Changes in starch and iodine
Experimental steps:
1. Place the petri dish containing starch on the white paper
2. Use a dropper to drop 1-2 drops of iodine on the starch. Observe carefully. What changes have occurred to the starch?
Think about it:
Is the blue-purple substance still rice and starch?
Is it a new substance?
What kind of changes have occurred in them?
How can we take advantage of this change?
What we found:
There are four main categories of foods containing starch in life:
Cereals and noodles: rice, glutinous rice balls, cereals, bread, steamed buns, noodles, corn, cakes, biscuits...
Root vegetables: potatoes, taro, sweet potatoes, pumpkins, lotus roots, yams, sweet potatoes...
Legumes and vegetables: peas, mung beans, red beans...
Fruit foods: bananas, apples, dates, peaches...
Expand and extend:
The chemical reaction between starch and iodine is used for:
1. Detect counterfeit banknotes. The printing of banknotes requires a high degree of secrecy, and many measures are taken to prevent counterfeiting, one of which is to remove the starch from the paper. Just drop iodine on the banknotes and see if the banknotes turn blue. If blue appears, it is counterfeit.
2. Treat iodine poisoning. People are poisoned by accidental ingestion of iodine, so taking starch orally is a simple and easy way.
Keywords: teaching courseware on changes in matter, teaching courseware on changes in rice starch and iodine, download science PPT courseware for sixth grade volume 2 of the textbook edition, download science slide courseware for sixth grade, download PPT courseware on changes in matter, rice starch and iodine Change PPT courseware download, .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...
"Changes of Rice, Starch and Iodine" Changes in Substances PPT:
"Changes of Rice, Starch and Iodine" Changes in Substances PPT Part 1: Rice that changes flavor. Take a bite of rice and tell me what the rice tastes like? How do you feel when you chew it for a while? When sweetness appears, swallow the rice. The rice appears sweet,...
"Changes in Rice, Starch and Iodine" Changes in Substances PPT Courseware 3:
"Changes of Rice, Starch and Iodine" Changes in Substances PPT Courseware 3 Rice that changes flavor. What does rice taste like when you usually taste it? What does it taste like if you chew it for a while? What causes the sweetness of rice? Does chewing rice and steamed buns feel the same? There was nothing at first...
File Info
Update Time: 2024-09-08
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