Effect of temperature on the life of rat women experiment report .

Method steps: 1. Put the same weight of wet soil and rat woman in three iron boxes.

10 of each are covered with glass panes (to prevent escape).

2. Put the three iron boxes in the refrigerator and two incubators.

3. Ensure that the light of the incubator and refrigerator is the same.

4. Place it for 10 minutes to observe the behavior of rat women in different positions

Place. Refrigerator.

Incubator 1 (30 degrees Celsius.)

Incubator 2 (60 degrees Celsius).

Result of the test on the condition of the rat woman: in the refrigerator: basically dead.

Incubator 1: Normal.

Incubator 2: Basically dead light.

That's pretty much it.

Experiment Report: Effect of Temperature on the Life of Rat-Woman.

First, the purpose of the experiment.

The purpose of this experiment was to understand the relationship between temperature and the survival, activity frequency and distribution of rat women, so as to provide experimental basis for further research.

Second, the principle of experiment.

The rat woman is an arthropod that lives in a terrestrial environment and has some adaptability to temperature. In this study, the common rat women in XX area were selected as the research objects, and the survival status, activity frequency and distribution of rat women at different temperatures were observed and recorded by setting different temperature conditions.

3. Experimental procedures.

1.Prepare experimental materials: rat woman, petri dish, heating equipment, thermometer, wet towel, etc.

2.The rat women were placed under different temperature conditions, and their survival status, activity frequency and distribution were observed and recorded.

3.Set the experimental temperature gradient as , e.g., and place 5 rat women at each temperature condition.

4.Place wet towels at different temperatures for a certain period of time to keep the ambient humidity constant and reduce the influence of humidity on the experimental results.

5.Observe and record data and draw graphs.

4. Experimental results and data analysis.

The following is the experimental data record table:

Temperature ( ) Survival Status |Activity frequency (times 10min) |Distribution |

5 |Active |Petri dish bottom |

10 |Active |Petri dish bottom |

15 |Active |Petri dish bottom |

20 |Active |Bottom and edge of Petri dish |

25 |Inactive |Petri dish edge |

30 |Inactive |Upper part of the Petri dish |

Based on the experimental data logging table, we can draw the following conclusions:

1.With the increase of temperature, the activity frequency of rat women gradually increased, indicating that temperature had a promoting effect on the activities of rat women.

2.When the temperature reaches 25, the survival status of the rat woman begins to become inactive, and the frequency of activity decreases. This may be due to the adverse effects of excessively high temperatures on rat women.

3.There were also differences in the distribution of rat women under different temperature conditions. At lower temperatures, rat women are mainly distributed at the bottom of the petri dish; At higher temperatures, rat women tend to be distributed on the edges and upper parts of the petri dish.

This may be related to the survival needs and adaptation strategies of rat women under different temperature conditions.

V. Conclusions. This experiment showed that temperature had a significant effect on the life of rat women. As the temperature increases, the frequency of activity of the rat woman gradually increases, but when the temperature is too high, the survival status of the rat woman begins to become inactive.

In addition, there were also differences in the distribution of rat women under different temperature conditions. These results will help us to better understand the effect of temperature on the life of rat women, and provide experimental basis for further research.

Soil moisture on rat women.

lives have an impact. This conclusion can be verified by biological experiments:

Solution: Wet soil was placed on one side of the iron plate, dry soil was placed on the other side, and a glass plate was covered, with the purpose of setting up a control group with soil moisture as the only variable. Collect a number of rat women, put 5 rat women on each side of the iron plate**, and observe the behavior of the rat women.

Analysis results: You can do several sets of repeated experiments, and finally count and calculate the average value.

The conclusion of the experiment was that the moisture of the soil had an effect on the life of the rat woman, who preferred a moist soil environment.

Notes:1The number of collected rats should be large enough to prevent the collected rats from getting sick or in a special growth period, and other factors should be excluded as much as possible; 2.

When doing experiments, it is necessary to know that the light source has an impact on the rat woman, so the light on both sides of the iron plate should be consistent, so that the experimental results will be accurate.

The general process starts from discovering the problem and raising the problem, and after discovering the problem, make assumptions about the answer to the problem according to their existing knowledge and life experience Design the first plan, including the selection of materials, design methods and steps, etc. After reaching a conclusion, it is also necessary to reflect on the whole process

a. Ask the question: Does temperature have an effect on the life of rat women? (Try to find problems related to biology from daily life, production practice, or learning Try to describe these questions in writing or orally, describing the conflict between known scientific knowledge and the problems found, it must be a question"? ”

b Make a hypothesis: It is a positive or negative question raised, so the hypothesis of the experiment is: temperature has an effect on the life of the rat woman, and the rat woman is suitable for living in a warm environment

c Make a plan: according to the hypothesis to develop a scientific plan, so design a control experiment: put 10 rat women into the dissecting plate in turn, count the number of rat women on the side with or without ice cubes, and count 10 times

D implementation plan: according to the plan to carry out the experimental operation 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 with the horizontal axis center line as the boundary, spread a layer of ice cubes on one side of the carton at room temperature, and cover it with cardboard (so that two environments of room temperature and low temperature are formed in the box), that is, do experiments according to the experimental plan, observe carefully, and carefully record the experimental data

e Conclusion: Summarizing the results of the implementation plan, it was concluded that the life of the rat women was affected by temperature i.e. the high number of rat women found on the side of the dissecting disc without ice cubes supported the hypothesis

f Expressive: Report to the class about the process and results of his experiment

1.Ask the question: Is soil moisture for rat women.

Does life have an impact?

2.Make a hypothesis that soil moisture has an impact on the life of the rat woman.

Ingredients: 10 rat women, a little dry soil, wet soil, a small iron box.

3.Experimental process: take a small iron box, put dry soil on the left side of the iron box, and put it on the right side; Put 10 rat women in the iron box at the same time, put the iron box in a cold environment, and observe the trend of the rat women at different times.

From the morphological structure analysis of the rat woman, it may belong to the invertebrate.

annelids.

The variables for this experiment were soil moisture; Ten rat women were used instead of 1 in the experiment, a control experiment was designed, a repeat group was set, and the data were averaged.

The purpose is to control for a single variable, eliminate individual causes, and reduce errors.

4.Experimental Expectation and Analysis: Rats are suitable for living in a humid environment.

5.Conclusion: Soil moisture has an effect on the life of rat women.

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 problem is to identify, control the experimental variables, and set up the control experiment.

Ask the question: Do the rat women prefer bright or dark environments?

Make a hypothesis: The rat woman prefers a bright environment.

Make a plan: Collect at least 10 rat women for experiments by placing damp and fluffy soil in a box about 30cm to 40cm to create two variables, dark and bright.

Design idea: Design a controlled experiment with light as a variable.

1. Provide two environments: dark and bright for the rat woman. How?

Cover the box where the rat woman is active with an opaque cloth or tin foil on one side to see the light.

What is a controlled experiment?

In general, when a certain test is conducted to clarify the effect or significance of a certain effect on an object, except for the factors or operational treatment required by the experiment, all other factors are consistent, and the results of the test are compared, such an experiment is called a controlled trial.

The variables in this trial are (light) and the other conditions must be the same except for the variables.

2. Do you need to use at least 10 rat women for experiments? Why? Is it okay to use only one rat woman for experiments?

In order to reduce the experimental error, no.

Implementation plan: According to the experimental plan, the experiment should be carefully observed, carefully recorded, and the experimental data should be recorded in the design.

Why do you need to calculate the average of the groups in the class?

Reduced Error Expected Results: The rat woman always stays in a dark environment.

Conclusion: The Rat Woman prefers a gloomy living environment.

Try again: If you want to think about the impact of soil moisture on the life of the rat woman, and how to design a plan, please try to complete the following steps:

The question you ask is: Do rat women prefer wet or dry environments?

Make a hypothesis: The rat woman prefers a humid environment.

Experimental design ideas: Moisture is a variable to design control experiments.

Suppose the result of the experiment is that the rat woman is on the side of the moist soil.

You have come to the conclusion that rat women prefer humid environments.

Rat women like to inhabit under rotten trees, rotten leaves, stones, etc., and sometimes they can be found in houses and courtyards. It is normal for rat women to live between 20---25 degrees. If the indoor and outdoor temperature is about 25 degrees, it can be found in the front and back of the house, under the rubble, in the basin, and in the altar; If the temperature is below 25 degrees Celsius, you need to choose a warm flower cellar, next to the sewer in the courtyard, or under the kitchen floor tiles in bungalow conditions.

When we collected in the school garden, we found that the number of rat women was smaller, and the individuals were smaller, with some small individuals being the mainstay. It can be collected under the bottom of pots, but the number is small, if the pot is placed on the concrete floor, the number will be very small, and the amount of excessive water will be greatly reduced. For the convenience of collection, we found after some efforts that if the Taiwanese grass is shoveled up and covered on the lawn next to the wall (can be covered with two to three layers), do not water for a few days, and after the grass is dry, water a small amount of water for about three days, as long as it is relatively wet.

If you start collecting in about a month, you can get a larger number of rat women. Moreover, the harvesting process is very convenient, as long as the turf is removed. During the collection of rat women, it must be carefully protected, and after collection, the container should be filled with some wet soil and pay attention to ventilation.

Wet soil is best rich in organic matter, preferably black, and can be used for a few rotten leaves or small roots of some plants.

Resources.