"New Life Hatched from Silkworm Eggs" Animal Life Cycle PPT Courseware 2

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"New Life Hatched from Silkworm Eggs" Animal Life Cycle PPT Courseware 2

do you know?

There are many types of animals in nature, and their body shapes, structures, and living habits vary widely. However, all animals have to go through the entire process of birth, growth and development, reproduction, and death. This process is their life cycle.

For different animals, the life cycle length is different, some are a few hours, some are as long as hundreds of years, some have little change in shape at different stages of life (such as tigers, horses, etc.), and some have different shapes at different stages of life. Big changes (such as butterflies, silkworms, etc.).

To summarize:

Color of silkworm eggs: purple-black (light yellow when newly laid)

Shape of silkworm eggs: oblate (oval) with a slight depression in the center

Size of silkworm eggs: about 1 mm wide and 0.5 mm thick

I also found: there are yellow eggs and white eggs.

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

Do silkworms need a certain temperature to grow?

The level of external temperature has a great relationship with the growth and development of silkworms. If silkworms are exposed to a temperature of 16°C for a long time, their movements will be sluggish, their development will be slow, their weight will be reduced, their body size will become smaller, and the yield and quality of their cocoons will be reduced. At a low temperature of 7.5°C, silkworms neither eat nor move and stop developing. If silkworms are exposed to high temperatures above 30°C for a long time, silkworms will also have development difficulties, metabolic decline, and are prone to illness. Therefore, if the outside temperature is too high or too low, it will have an adverse impact on sericulture. This requires us to manually maintain a certain temperature in the silkworm room.

Do silkworms need a certain amount of humidity to grow?

The level of humidity in the air also directly affects the dispersion of silkworm body moisture, body temperature regulation and material metabolism. The moisture that silkworms need comes from mulberry leaves. If the humidity of the silkworm chamber is low and too dry, the silkworms will evaporate more water from the surface of the body, and the water obtained from the mulberry leaves will not be able to meet its needs, hindering the growth and development of the silkworms, and the mulberry leaves will easily dry up and be damaged. If the humidity in the silkworm room is high or too humid, the water in the silkworm's body will dissipate slowly. If there is too much water in the silkworm's body, the silkworm's body will be puffy and fat, and it is easy to get infected and sick. Therefore, the jam room must maintain a certain air humidity

1. I know.

1. The newly hatched silkworms are ( ) colored, like little ants.

2. The mulberry leaves eaten by the silkworms should be cut into ( ) or ( ).

3. In addition to keeping the "room" of the silkworms clean, pay attention to placing the silkworms in ( ) and do not spray ( ) in the room where silkworms are raised.

2. I am a little judge.

1. When the weather is dry, put silkworm eggs in water and they will hatch easily. ( )

2. After the silkworms emerge from their shells, you can pinch them onto the mulberry leaves with your hands. ( )

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For more information about the PPT courseware "The Life Cycle of Animals: New Life Hatched from Silkworm Eggs", please click the "Life Cycle of Animals ppt New Life Hatched from Silkworm Eggs" ppt tag.

"New Life Hatched from Silkworm Eggs" PPT download of animal life cycle:

"New Life Hatched from Silkworm Eggs" Animal Life Cycle PPT Download Part One: Introduction of New Knowledge Let's talk about it. We have raised snails. How do snails grow and change throughout their lives? How long is its lifespan? Usually between 5 and 6 years old. What do you know about silkworms?

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

"New Life Hatched from Silkworm Eggs" Animal Life Cycle PPT Part One: Observing Silkworm Eggs Let us raise silkworms and observe the growth and changes of silkworms throughout their lives. The life of a silkworm starts from an egg, and a silkworm egg is a life. Observe the color and size of silkworm eggs...

"New Life Hatched from Silkworm Eggs" Animal Life Cycle PPT Courseware 3:

"New Life Hatched from Silkworm Eggs" Animal Life Cycle PPT Courseware 3 The small insect with the shortest life cycle mayfly. Its scientific name is mayfly, and it looks a bit like a mosquito. They come into the world simply to complete the cycle of life: birth, growth, reproduction, death. ..

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Update Time: 2024-11-19

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

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