"Growth and Changes of Silkworms" Animal Life Cycle PPT Download

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"Growth and Changes of Silkworms" Animal Life Cycle PPT Download

Part One: Importing New Knowledge

Talk about it

Classmates, what is this fluffy little thing? How does it develop? What did you discover while recording your observations?

What are ant silkworms like?

The color is brown, small and hairy. The ant silkworm is about 2 mm long and 0.5 mm wide.

PPT on the growth changes of silkworms, part 2: new knowledge explanation

Communicating the growth changes of silkworms

What changes occur to the silkworm as it grows?

Changes in silkworms include:

1. Color changes

2. Changes in size (body length, weight)

3. Changes in eating and defecation

What do you know about silkworm age?

From ant silkworm to first molt to first instar

Entering the second age after rising from sleep

Entering the third instar after the second molt

Entering the fourth instar after the third molt

The fourth molt is also called the Great Sleep. Entering the fifth age after the Great Sleep

The fifth-instar silkworm baby grows extremely fast, reaching a body length of 6 to 7 centimeters, and a body weight that can reach about 10,000 times the weight of an ant silkworm.

PPT on the growth and changes of silkworms, part 3: Consolidation exercises

1. Fill in the blanks

1. The shape of silkworm is ( ) shape, and its body is divided into three parts ( ), ( ), and ( );

2. Silkworms use ( ) to eat mulberry leaves, use ( ) to crawl, and use ( ) to breathe.

3. When the silkworm's body turns yellow and shiny and stops eating, it will ( )

2. Judgment questions

1. The appetite of silkworms increases greatly when they molt. ( )

2. The sleeping silkworm is motionless on the outside and motionless on the inside. ( )

PPT on the growth changes of silkworms, part 4 content: Class summary

What did you learn in this lesson?

1. Understand the changes in silkworm length, weight, food intake, etc. during the growth process

2. Master the appearance and behavior of silkworms, and learn to use words and pictures to record the changes that occur in silkworms

3. Learn to distinguish silkworms that are about to spin silk, create a place for it to spin cocoons, and master the conditions for silkworms to spin silk and spin cocoons smoothly, etc.

4. Share observation and recording results among classmates to enhance friendship among schoolmates.

Keywords: Free download of Chinese PPT courseware for the second volume of the third grade of the textbook version, PPT download of the growth changes of silkworms, PPT download of the life cycle of animals, .PPT format;

For more information about the PPT courseware "The Life Cycle of Animals and the Growth and Changes of Silkworms", please click the "The Life Cycle of Animals and the Growth and Changes of Silkworms" ppt tag.

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Update Time: 2024-11-22

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

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