The first year of biology The Effect of Light on the Ratwoman Investigation Experiment Report Form

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1. Experimental report on the living environment of the student ** rat woman.

Experiment content: What is the living environment of the rat woman related to?

The purpose of the experiment: to let students know what is related to the living environment of the rat woman through the experimentExperimental equipment: several rat women, two petri dishes, and some damp soil Experimental steps:

Divide the rat woman into two equal parts and place them in Petri dish A and Petri dish B respectively, where Petri dish A is put in an appropriate amount of moist soil and placed in a cool place, and Petri dish B is not put in moist soil and placed in a sunny place.

Experimental Record: The rat woman placed in the shade grows normally, and the rat woman placed in the sun gradually diesExperimental results: The living environment of the rat woman is related to humidity and sunlight exposure 2.

Experiment content: (Just change the name above).

Experiment time: Purpose of the experiment: Let students understand how earthworms can run fast through experiments Experimental equipment: 1 earthworm, glass plate, wooden board, 16 open paper Experimental steps: Let the earthworm climb on the glass plate, wooden board, and 16 open paper respectively, and observe which one runs fast.

Experiment Log: Earthworms crawl slowly on glass plates, climb fast on paperResults: Earthworms crawl fast on wrinkled objects.

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Summary. Purpose of the experiment:

The main purpose is to enable students to understand the general process of ** and appreciate the importance of controlling experimental variables and setting up control experiments.

Experiment: Ask the question: Does light affect the life of a rat woman?

Make an assumption that the rat woman is adapted to live in a dark environment, and that light will affect the life of the rat woman.

Make a plan:1Materials and utensils: 10 rat women per group, wet soil, iron plates (or plastic plates, cartons), cardboard, glass plates.

2.Experimental setup: Put a layer of wet soil in the iron plate, bounded by the center line of the horizontal axis, cover one side with cardboard, and cover the other side with a glass plate, so that two environments of dark and bright are formed in the plate.

3.Method Steps:

1) Divide the class into small groups to conduct experiments;

2) Put the rat woman into the experimental device, put the same number of rat women on both sides, and let it stand for 2 minutes.

3) Count the number of rat women in bright and dark places every minute, and count them many times.

4.Implementation plan: The experimental process should be carefully observed and carefully recorded.

Conclusion: Light affects the life of the rat woman.

What is the knowledge of the influence of light on the life of the rat woman?

Purpose: The main purpose of the experiment is to let students understand the general process of **, and to understand the importance of controlling experimental variables and setting up control experiments. **Experiment:

Ask the question: Does light affect the life of a rat woman? Make assumptions:

The rat woman is suitable for living in a dark environment, and the light will affect the life of the rat woman. Make a plan:1

Materials and utensils: 10 rat women per group, wet soil, iron plate (or plastic plate, cardboard box) Qinglu, cardboard, glass plate. 2.

Experimental device: Put a layer of wet soil in the iron plate, with the horizontal axis center line as the boundary, one side is covered with cardboard, and the other side is covered with a glass plate, so that two environments are formed in the plate, dark and bright. 3.

Method steps: (1) The whole class was divided into several groups to conduct experiments; (2) Put the rat women into the experimental device, put the same number of rat women in the middle of the two sides, and let them stand for 2 minutes (3) Count the number of rat women in bright and dark places every minute, and count them many times. 4.

Implementation plan: The experimental process should be carefully observed and carefully recorded. Conclusion:

Light affects the life of the rat woman.

The knowledge points of this intermediate design are the general process of experimentation: lead science: asking questions, making false designs, making plans, implementing plans, drawing conclusions, expressing and communicating

1. Impact: drying; Damp; Damp; Water; Black; Glass; Dark; Light.

2. Analysis: Experiments include asking questions, making hypotheses, designing experiments, implementing experiments, drawing conclusions, and expressing and communicating. This question examines the experiment of the influence of water and light on the life of the rat woman, and understands the scientific method and steps by answering this question.

The key to solving this training problem is to determine and control the experimental variables and set up the control experiment.

This experiment probably wants to prove that the rat woman likes to live in a dark environment. The black cardboard is to block the light, and the setting B is not to block the light or to ensure that the light is sufficient. Covering the whole soil is to ensure that the rest of the living environment of the rat woman is the same.

To give you a junior high school biology test question for reference, it should be about the same.

Topic: If you turn over flower pots or stones in your garden or courtyard, you will often see some small animals crawling with slightly flattened, oblong, gray-brown or black bodies. When you move a pot or rock, the rat woman quickly crawls away.

Why is that? Is it because the environment has become brighter? A student has done this, please fill in the process of his ** activity.

Ask the question: Do rat women choose a shady environment?

1) Make assumptions:

2) Formulate and implement the first plan: put a layer of wet soil in the iron plate, cover one side with opaque cardboard, cover the other side with a transparent glass plate, and put 5 rat women on both sides of the iron plate to observe the behavior of the rat women. The variables for this experiment are .

If you put 1 rat woman on each side of the iron plate, can you draw an accurate conclusion? Why?

Answer: (1) The rat woman will choose a dark environment (or the distribution of the rat woman will be affected by light).

2) Light. No. The number of rat women is too small, and the results of the experiment are accidental.

(1) The principle of a single variable is to keep only one variable in the two groups of control experiments, and this variable is the factor you want to ** For example: ** "The influence of light on the life of the rat woman" experiment, the variable set is the light Other conditions are the same and appropriate

2) According to the experiment of "the effect of light on the life of the rat woman", the question asked: Does light have an effect on the life of the rat woman? It can be hypothesized that light will affect the life of the rat woman or that light will not affect the life of the rat woman

3) The purpose of multiple experiments is to reduce the influence of other accidental factors and cause errors in the experiment If the collected rat women are sick, or affected by other abiotic factors, and are in a special growth period, the experimental conclusions will be wrong, so in order to reduce the error and improve the accuracy of the experiment, more rat women should be used in the experiment as much as possible, and the interference of other factors should be excluded as much as possible

4) Experimental device: put a layer of moist soil in the carton, bounded by the center line of the horizontal axis, cover one side with a glass plate, and cover one side with cardboard In this way, two environments of darkness and light are formed in the box, and the control experiment is with light as the only variable

5) Conclusion: The rat woman likes to live in a dark environment

So the answer is: (1) a single variable.

2) Does light have an impact on the life of the rat woman?

3) Reduce errors and improve experimental accuracy.

4) gloomy; Bright.

5) Gloomy.

A good start is the foundation of successful teaching, and the very important experiments are arranged at the beginning of the seventh grade biology. "The Effect of Light on the Life of the Rat Woman"This is the first ** activity that students are exposed to when they enter middle school. If this experiment can be done well, so that students can feel the joy of the activity from the first, and obtain the verification and experience of life knowledge from the first, it will stimulate students' interest in biological science learning and will have a double effect on cultivating students' ability.

I have been teaching biology in junior high school, and in my actual teaching work, I found that since the reform of the biology curriculum, through the penetration of the teaching process, students' ability to carry out science has improved significantly compared with before the curriculum reform. However, I still saw many problems in my own teaching reflection, for example, it is still a difficult problem to guide students on how to design a scientific, reasonable and operable experimental program, which should not only be accurately expressed, but also conform to the experimental principles. So learn"The Effect of Light on the Life of the Rat Woman"It is a good start to carry out biological experiment teaching, and if this experimental teaching can be carried out well, it is the key to the learning of this discipline.

In view of this, I am aimed at:"The effect of light on the life of the rat woman"**Activities, the following instructional design and instructional implementation activities are carried out.

1.Student preparation.

As rural students, they often see the activities of rat women in their own activities. Therefore, before class, students are asked to look for rat women in front of and behind their houses, observe the environment in which they live and survive, and think about why rat women generally only live in these common environments.

2.Ask questions.

Questioning is often the beginning of innovation, and asking questions is the foundation of science. However, it should be noted that when raising questions, teachers only guide, and students think about themselves, because raising questions is inseparable from students' initiative, enthusiasm and creativity. It is necessary for them to examine the original knowledge and experience from a new perspective, distinguish and clarify the differences between the old and new knowledge, and produce conflicts and contradictions in understanding, so as to propose a new possibility.

Special attention should be paid to the questioning questions raised should come from the students' life experience, so that the teaching experiment activities can be cut into the actual life of the students, and the students' interest in the experiment will be stronger. In teaching, teachers can design some scenarios containing real events or real problems in a purposeful and planned manner according to the teaching content, so that students can independently ask questions and try and express these problems in the activities of mastering events or solving problems. For example, before the experiment, the teacher first gives the students the first topic"The influence of the environment on the life of the rat woman"to make it clear to students how the goal of this activity is how the environment affects the life of the rat woman.

In the observation activities carried out before class, students are guided to ask various questions about the living environment of the rat woman, such as if the student finds the rat woman in a dark place and does not find the rat woman in a bright place, they will ask the question: What kind of environment does the rat woman like to live in? There are many environmental factors, such as light, soil, humidity, temperature, air, food, natural enemies, etc.

for these environments.