"New Life Hatched from Silkworm Eggs" Animal Life Cycle PPT Download

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"New Life Hatched from Silkworm Eggs" Animal Life Cycle PPT Download

Part One: Importing New Knowledge

Talk about it

We have raised snails. How do snails grow and change throughout their lives?

How long is its lifespan?

Usually 5 to 6 years

What do you know about silkworms?

Silkworms are white

Silkworms eat mulberry leaves

Silkworms spin silk

Silkworm pupae are brown

Silkworms turn into pupae

Silkworms turn into moths

New life hatched from silkworm eggs PPT, part 2: new knowledge explained

Observe silkworm eggs

Observe the color and size of silkworm eggs and talk about your findings.

The life of a silkworm starts from an egg, and a silkworm egg is a life.

Tell me what method you use to observe silkworm eggs?

Use a magnifying glass to enlarge, touch with your hands, and measure the width with a ruler.

Group report

(1) The center of silkworm eggs is concave;

(2) If you find that yellow eggs remain yellow for a long time, they are unfertilized eggs and will not hatch into silkworms.

(3) If it is white, it is an empty egg shell from which silkworms have hatched;

New life hatched from silkworm eggs PPT, Part 3: Consolidation exercises

1. Fill in the blanks

1. Use a magnifying glass to observe silkworm eggs. You will find that silkworm eggs are flat ( ), ( ).

2. The whole body of a newly hatched silkworm baby is covered with fine hairs.

2. Judgment questions

1. Use a magnifying glass to observe silkworm eggs. You will find that the size and color of silkworm eggs will not change during the entire incubation process. ( )

2. In order to ensure that the silkworm eggs hatch normally, the silkworm eggs should be placed in a sterilized and warm room. ( )

3. In order to keep the silkworms well fed, water should be sprayed on the mulberry leaves frequently. ( )

4. The little silkworms that have just hatched from the eggs should be put on the mulberry leaves with your fingers ( )

5. During the process of raising silkworms, in order to prevent the silkworm babies from catching cold, the doors and windows of the silkworm room should be closed. ( )

6. The leaves that silkworms like to eat most are lettuce leaves ( )

New life hatched from silkworm eggs PPT, Part 4 content: Class summary

What did you learn in this lesson?

1. Learn to observe the color, size and shape of silkworm eggs in the practice of raising silkworms. Share observation results with classmates in class

2. Understand that silkworms are little lives hatched from eggs. Requires air moisture and temperature

3. Learn to measure the size of silkworm eggs by yourself using daily items and tools

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Update Time: 2024-09-30

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

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