"Bread is Moldy" Food PPT Courseware

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"Bread is Moldy" Food PPT Courseware

Watch for moldy bread

(1) Direct observation

It turned out that there was a lot of mold growing on the bread.

(2) Observe with a magnifying glass and microscope

What other items have you seen become moldy and spoiled?

What factors are related to moldy bread?

What information can be obtained from observation activities that can help us conduct analysis?

What other information is needed?

Experiment: (Four pieces of bread, use a toothpick to put some mold on each piece of bread)

Keep the first piece of bread dry, drop 10 drops of water on the second piece of bread, put them in two plastic bags, tie the bag mouths tightly with thread and put them on the table.

How to experimentally verify the relationship between bread mold and air?

How to experimentally verify the relationship between bread mold and sunlight?

discuss:

1. Among these two groups of bread, which piece of bread has the fastest mold growth?

2. Study the effect of light on mold growth

Bread and other foods may develop mold after being stored for a long time. Mold needs a moist and warm environment to grow, and it also needs nutrients.

test you

fill in the blank:

Bread becomes moldy because a kind of organism grows on it - ( ). Like other organisms, its growth requires access to ( ) and suitable ( ). Because ( ) produced during the moldy process contains substances harmful to the human body, moldy and spoiled food must never be ( ) eaten.

True or False

1. Food will also change during the storage process. ( )

2. The mold produced during the moldy process of food contains substances harmful to the human body. ( )

3. It would be a pity to throw away moldy food. You can eat it after washing it. ( )

4. We placed the first piece of bread in a dry place at room temperature, and the second piece of bread in a humid place at room temperature to study the effect of moisture on the growth rate of mold. ( )

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"Bread is Moldy" food PPT download:

"Bread is Moldy" food PPT download Part 1: New knowledge explanation 1. Observe moldy bread Bread becomes moldy because a kind of mold grows on it. Observation experiment requirements Observe the appearance and color of the mold on the bread. Be careful when observing! ..

"Bread is Moldy" Food PPT:

"Bread is Moldy" Food PPT Part One: Observing Moldy Bread Use a magnifying glass to observe moldy bread. Record the changes that occur to the bread. Bread becomes moldy because a biological mold grows on it. Mold is the common name for filamentous fungi. ...

"Bread is Moldy" Food PPT Courseware 4:

"Bread is Moldy" Food PPT Courseware 4 I will fill in the blanks 1. In order to ensure the absorption of nutrients, some foods are suitable for ___, and some foods are suitable for ___. 2. The ____ and ____ in food will change after heating and become easily ____ and ____ by the human body. 3. Raw..

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Update Time: 2024-10-02

This template belongs to science courseware Fourth Grade Science Volume 2, Textbook Edition industry PPT template

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