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"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 prefer dark or light environments?
How should this experiment be designed?
Comparative Experiment. Change conditions: light.
How many earthworms to put in? How long does it take to check?
There are many sensory cells on the body wall of earthworms.
Suggested experimental steps
1. Cut off part of one end of the rectangular box, cover it with a glass piece, and wrap the other end with black cloth.
2. Put plastic film at the bottom of the box to protect the earthworms and make it easier for them to crawl.
3. Place a few earthworms in the middle of the box and close the lid.
After 4.5 minutes, open the lid and observe and record.
5. Place 5 more earthworms in the middle and do it again.
Suggested experimental steps
1. Spread soil of the same soil quality on both ends of the other box, but one side is dry and the other is wet.
2. Place a few earthworms in the middle of the box and close the lid.
After 3.5 minutes, open the lid and observe and record.
4. Do it one more time.
Experimental conclusion: Earthworms like moist environments.
Earthworms live in a dark, humid environment rich in organic matter. The optimal temperature is 15℃-25℃. The soil moisture content generally survives in an environment with a soil moisture content of more than 60%.
All kinds of animals like to live in certain environments
Different animals have different requirements for the 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.
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"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 5:
"The Choice of Earthworms" Biology and Environment PPT Courseware 5 Earthworms in Science Earthworms are the general name for animals in the class Oligochaeta of 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 layer of...