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E-education edition fifth grade science volume 2	pptx	6 MB

"Colorful Life" PPT courseware

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Upload Time: 2024-09-09

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"Colorful Life" PPT courseware

Think about it and say it:

From the previous lessons, can you talk about the differences between various animals from one or several aspects?

Tip: It can be described from the differences in animal shape, living environment, and living habits.

The largest animal, the blue whale, is 30 meters long and weighs 170 tons. The smallest animals, such as Paramecium, are 80 microns long and require a microscope to see.

Stage 1 - Egg

The first is the egg. You see it cannot be eaten, but don’t think it is alive. In fact, it is working hard to develop into a larvae inside! .

Second stage - larvae

The larvae's task is to eat. It uses its chewing mouthparts to constantly chew on plant leaves. Coupled with its digestive system that accounts for a high proportion of its body for digestion and absorption, its weight can increase three thousand times. This is preparation for the next stage, because then it becomes a pupa that cannot eat.

The third stage - pupa

The pupa looks like it doesn't move, but in fact it changes a lot inside! At this time, it is trying very hard to grow. For example, the wing buds originally inside the larval body will turn outside the body and develop into wings. �When it develops into a complete adult butterfly, the butterfly will squeeze open the pupa shell, first exposing its feet and antennae, and then the whole body will struggle out of the pupa shell. This process is called "eclosion".

The fourth stage - becoming a butterfly

The pupa butterfly breaks free from the pupa shell, completes the process of emergence, and becomes a beautiful butterfly that everyone loves.

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Update Time: 2024-09-09

This template belongs to science courseware E-education edition fifth grade science volume 2 industry PPT template

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Colorful life ppt

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"Colorful Life" PPT courseware