"Changes of Food in the Mouth" Our Body PPT Courseware

Description

"Changes of Food in the Mouth" Our Body PPT Courseware

Activity task one (observation of oral cavity)

Observation method:

Take a bite of bread, chew it 5 times in front of the mirror, and observe the changes in the bread; then feel the changes in the bread while chewing it; chew it 20 times and observe the changes in the bread in the mirror; finally swallow the bread.

Observation tasks:

1. Observe how the bread changes?

2. Observe what in the mouth changes the bread?

Activity task 2 (observe teeth)

1. Everyone looks in the mirror to observe the difference in the shape of the teeth from the outside to the inside, and uses pictures to draw the different shapes of teeth (draw one for each shape).

2. Everyone eats bread in front of the mirror, observes and experiences what shapes of teeth are used, and writes down the functions of teeth based on eating bread and eating other foods before.

Discussion and exchange:

(1) Think about it, how do you usually take care of your teeth?

(2) What bad habits do you think will affect tooth growth?

(3) How to maintain oral hygiene?

do you know?

Tooth growth knowledge.

Classmates, our fourth grade students are in the period of teeth replacement, and teeth only change once in a person's life. Therefore, the teacher hopes that students will pay attention to protecting their teeth so that they can enjoy food happily and grow up healthily throughout their lives!

( ) 1. The initial digestion of food in the oral cavity is completed by teeth, tongue, and saliva.

( ) 2. Teeth of different shapes play the same role in digesting food.

( ) 3. The stomach can also turn food into chyme, so food does not need to be chewed in the mouth.

( ) 4. When we chew rice, we will feel the sweet taste. This is because the amylase in saliva changes the starch in the rice into sugar.

Check the following correct ways to “protect your mouth”:

( ) 1. Often use toothpicks to pick out the gaps between teeth.

( ) 2. Brush your teeth in the correct way.

( ) 3. Eat something cold immediately after eating something hot.

( ) 4. Don’t eat very hot food.

( ) 5. Rinse your mouth after meals.

( ) 6. Often eat sweets before going to bed.

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"Changes of Food in the Mouth" Our Body PPT Download:

"Changes of Food in the Mouth" Our Body PPT Download Part One: Observing the Mouth What would happen if we put food in the mouth and chew it (jǔ je) for a while? 1. Take a piece of steamed bun and chew it in your mouth. 2. Stop chewing 5 times and observe the texture of the food..

"Changes of Food in the Mouth" Our Body PPT:

"Changes of Food in the Mouth" Our Body PPT Part One: Observing the Oral Observe the changes of several different foods from entering the mouth to before swallowing. What happens to food in the mouth during different chewing times? Teeth in the mouth...

"Changes of Food in the Mouth" Our Body PPT Courseware 4:

"Changes of Food in the Mouth" Our Body PPT Courseware 4 Observe the Mouth Observe the change process of food from entering the mouth to before swallowing. What happens to food in the mouth during different chewing times? Observation method: Take a bite of bread and face...

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Update Time: 2024-11-18

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

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