Biology homework for junior high school Earthworms prefer light or dark experiment report

Research the question.

Do earthworms prefer a light or dark living environment? (Do earthworms prefer dry or wet soil?) My guess.

Earthworms prefer dark environments. (Earthworms like wet soil).

Same conditions. Air, humidity, temperature, 5 earthworms (air, temperature, light 5 earthworms) different conditions.

Light (wetting and drying of the soil).

Experimental Methods. Prepare a cardboard box, put the earthworms in the middle of the carton that is half bright and half dark, and observe where the carton climbs after 5 minutes? (Prepare a box, put the earthworm in the middle, put dry soil on one side and wet soil on the other, cover the box, and observe where the earthworm crawls after 5 minutes?) ）

It should be like a dark environment.

Take two boxes, make them half bright and half dark, then take 10 earthworms (they should have been bought together or dug up in a piece of land), and take 5 of them and put them in two boxes. 5 only in a bright place and 5 only in a dark place. After a period of time, look at the number of earthworms in the bright and dark places.

It's better to set up a few more groups and convince again!

Earthworms prefer to be in damp places and dark places.

Purpose: To verify whether earthworms tend to a dark environment.

Experimental hypothesis: earthworms will prefer a dark environment because they usually live in soil, and darker environments are more in line with their natural ecology.

Experimental equipment: 1Two similarly sized containers or chests, one capable of providing a dark environment and the other capable of providing a bright environment.

2.A transparent lid or mesh lid to cover the container.

3.Earthworms (the same number of earthworms).

4.Soil.

Experimental Procedure:1Prepare both containers, making sure they are similar in size. A container is placed in a dark room or covered with opaque material to provide a dark environment; The other container is kept in a bright environment and can be placed outdoors or exposed to light.

2.Add the right amount of soil to each container so that it resembles the natural habitat of earthworms.

3.Distribute the same number of earthworms evenly into both containers.

4.Cover with a clear lid or mesh lid to prevent earthworms from escaping.

5.Record the location and activity of earthworms in each container. It is possible to record the area where the earthworm is located, whether it burrows into the soil, whether it is active on the surface, etc.

6.Observe and record earthworm activity continuously, at least for a period of time (e.g., one hour).

7.Analyze and compare the behavior of earthworms in two containers. Note whether there are significant differences, such as more earthworms concentrated in the dark container, or more earthworm activity in the soil in the dark container.

By comparing the activity of the earthworms in the two Hunger Diggers, you can tell if the earthworms prefer the dark Ring. If more earthworm activity is observed in a dark container, or if more earthworms burrow into the soil, this will support the experimental hypothesis. Conversely, if more earthworm activity is observed in a bright container, this will contradict the experimental hypothesis and the observations may need to be re-evaluated or further**.