"The Choice of Earthworms" Biology and Environment PPT Courseware 5

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"The Choice of Earthworms" Biology and Environment PPT Courseware 5

earthworms in science

Earthworms are the general name for the Oligochaeta class of animals in the phylum Annelida. In scientific classification, they belong to the order Lumbriforme. The body is symmetrical on both sides and segmented; it has no bones and is covered with a thin layer of cuticle with pigment. Except for the first two segments of the body, all other segments have setae. Hermaphroditism, cross-fertilization, and egg cocoons produced by rings during reproduction to produce the next generation. There are currently more than 200 species of earthworms known, and they were called the most valuable animals on earth by biologist Darwin in 1837. Earthworms are called Dilong (Dilong Kaibian, Dilong Guang) in traditional Chinese medicine. According to the "Compendium of Materia Medica", they have the functions of dredging meridians, activating meridians, promoting blood circulation and removing blood stasis, and preventing and treating cardiovascular and cerebrovascular diseases.

Experimental design one

Our research question: Do earthworms like to live in a bright or dark environment?

Our guess: I think earthworms like to live in dark environments

Experiment preparation (materials): long box, earthworms, lights

Experimental method: Place 5 earthworms in the middle of a long box, cover the bottom with absorbent paper to protect the earthworms and facilitate crawling. Let one end of the box be illuminated and the other end kept dark. After 5 minutes, open the box, observe and record.

repeat.

Experimental design two

Our research question: Do earthworms like to live in humid or dry environments?

Our guess: I think earthworms like to live in humid environments.

Experiment preparation (materials): earthworms, strip box, water, soil

Experimental method: Spread soil of the same soil on both ends of the box, but one side is dry and the other is moist (note that the two types of soil in the middle should not be separated too far apart to facilitate the selection of earthworms); put 5 earthworms in the middle of the box. Close the lid.

After 5 minutes, open the lid and observe and record.

Experiment summary

Earthworms like to live in dark and humid environments

Supplement: Earthworms are cold-blooded animals that live in dark, humid, and organic matter-rich environments. The optimal temperature is 15°C-25°C. The soil moisture content generally survives in an environment above 60%.

think

1. What will happen to earthworms if they are placed in a dry environment for a long time?

2. Do all living things like this kind of living environment?

penguin

The hypertrophy of the body can reduce heat loss in the low temperature environment of Antarctica.

The fat accumulates thickly and can be used to maintain life when there is a lack of food in the polar night.

swan

First, they have the habit of migrating as the environment and climate change.

Second, the beaks and webs evolved in deep water environments can adapt to the life of swimming birds.

frog

Cold-blooded animals have the habit of hibernating as temperatures drop.

The frog's body color coordinates with the color of the surrounding environment and has a protective effect.

Class summary

All kinds of animals like to live in certain environments, and different animals have different requirements for the environment.

Expansion: When the environment is not suitable for animals to survive, they will choose a suitable environment to live in, otherwise they will have difficulty surviving.

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For more information about the PPT courseware "The Selection of Earthworms in Biology and Environment", please click the Selection of Earthworms ppt ppt tab in Biology and Environment.

"The Choice of Earthworms" Biology and Environment PPT Download:

"The Choice of Earthworms" Biology and Environment PPT Download Part One: Exciting Introduction Where are earthworms easy to find? What is a suitable living environment for earthworms? How to design experiments to prove our conjecture? ... ... ... The choice of earthworms PPT..

"The Choice of Earthworms" Biology and Environment PPT:

"The Choice of Earthworms" Biology and Environment PPT Part 1: Earthworms and the Environment Where are earthworms easy to find? What is a suitable living environment for earthworms? How to design an experiment to prove it? What conditions can only be changed in an experiment? What conditions will not be changed?

"The Choice of Earthworms" Biology and Environment PPT Courseware 4:

"The Choice of Earthworms" Biology and Environment PPT Courseware 4 Hello everyone, I am the legendary earthworm. Where do you usually see me? Do you know what kind of living environment I like? Experimental topic: Do earthworms like dark or light environments? How to design...

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Update Time: 2024-08-01

This template belongs to science courseware Fifth Grade Science Volume 1, Textbook Edition industry PPT template

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