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

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

The 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.

At first, they are just aquatic pupae. When the breeding season comes, after the mayflies (after just two days of "childhood") become adults, their lives can only be counted in minutes. Female mayflies reproduce and lay eggs and die after 5 minutes, while male mayflies can survive for 2-3 days.

Although mayflies are short-lived, their presence can indicate the extent of water pollution to humans because mayflies feed on garbage and algae.

The plant with the shortest life span--Chrysanthemum brevifolia

In the Sahara Desert of Africa, there is a species of Asteraceae called ephemera. It is the shortest-lived plant in the world, with a lifespan of only a few weeks. In the arid desert, rain is very scarce. As long as there is a little moisture from the raindrops, the seeds of the ephemeral chrysanthemum will sprout and grow immediately. Before the severe drought comes, it will rush to complete its life cycle, germinate, take root, grow, and grow. The whole process of flowering, fruiting and death.

The life of a snail

1) Incubation period: refers to the period from when the eggs are laid by the snail to when they hatch out of the shell.

2) Young snail stage: Young snail refers to the small snail stage within 30 days after hatching.

3) Adult stage: The young snail is between 1 month and 6 months old. This 5-month-old snail is called the adult stage. It is the period between young snails and seed snails. This stage of snails is a period of growth and development (individual enlargement) and reproductive growth (growth and development of sexual organs).

4) Snail breeding period: snails that have grown for more than 6 months.

hint:

Pay attention to the changes in the silkworm eggs, record the date and temperature when the silkworms hatch, and think about the conditions related to the hatching of the silkworms.

If the weather is dry, sprinkle some water on the silkworm eggs.

knowledge transfer

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.

Conditions required for silkworm life:

1. Suitable temperature and humidity;

~The temperature is around 25℃

~Relative humidity should be around 90%

2. Air must be circulated;

3. Sufficient food;

4. A safe and hygienic living place.

Tips on raising silkworms

Silkworms love to eat mulberry leaves. As soon as the eggs are hatched, use a brush or feather to gently brush them onto the mulberry leaves.

To keep the silkworms well fed, the mulberry leaves should be fresh and kept dry, cut into pieces or strips.

Frequently remove silkworm feces and leftover leaves to keep the silkworm "room" clean.

Place the baby silkworms in a well-ventilated area, and do not spray pesticides in the room where the silkworms are raised.

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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 2:

"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, but all animals have to go through birth, growth and development, reproduction, and 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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