The third lesson of "Tiangong Classroom" —— Spreading the seeds of science in space teaching

65438+ 10 month 12 afternoon,? Tiangong classroom? The third lesson is on the China Space Station. Astronauts of Shenzhou XIV, Liu Yang and Cai gave teenagers a wonderful space science lesson. Is this one too? God fourteen? Is it the first time for the three astronauts in the crew to serve? Space teacher? .

65438+ 10 month 12,? Tiangong classroom? The third lesson is on the China Space Station. The picture shows students watching in Henan Science and Technology Museum? Tiangong classroom? Lesson three. Xinhua News Agency reporter Xu Jiayu photo

In the interaction between heaven and earth, three astronauts became experimental cabins of China Space Station? A tour guide? Demonstration of capillary effect experiment and water polo change in microgravity environment? Lazy? Experiments in space and interesting drinking water, wrenches that can be turned around and other phenomena interact with the ground class.

Teaching in space makes teenagers feel the mystery of the universe, experience the fun of exploration, and stimulate their enthusiasm and yearning for space and scientific research.

Seeking a brand-new space capsule? Space classroom?

? Tiangong classroom? The main classroom on the ground of the third class is located in the Payload Operation Management Center of China Manned Space Engineering, which is located in the Space Application Engineering and Technology Center of Chinese Academy of Sciences. This is the core hub of scientific experiments on China Space Station, which is called the space experiment of China Space Station? Big housekeeper? . Every day, scientists remotely manage scientific experiments on the space station 400 kilometers away.

? Space teacher? Coming! Three astronauts take turns to like fish? Swimming? Enter the space capsule and begin to lead everyone to feel the magical microgravity environment in space.

What about the first two times? Tiangong classroom? No, this space lecture is brand-new? The space classroom is held in the candlestick experimental cabin. Cai became a cameraman, and Liu Yang introduced the scientific experimental cabinets in the candlestick experimental cabin one by one.

? This experimental cabinet consists of two parts, above which is the scientific glove box. We will collect plant samples here later. ? Chen Dong introduced that the scientific glove box is a universal basic scientific experimental facility, which provides a closed and clean operating space for scientific experiments, making scientific experiments more convenient and controllable.

Life ecology laboratory cabinets are like animal and plant cabinets? Space hotel? It is used to explore the effects of space microgravity and radiation on the growth, development and aging of biological individuals. ? The results of this experimental cabinet will help us to realize long-term life on the moon and even Mars in the future. ? Liu Yang said.

The biotechnology laboratory cabinet is equivalent to a small biological laboratory in space. Chen Dong introduced, what is its most powerful place? Fully automatic astronauts only need to load the experimental unit into the experimental cabin and start the experiment, so they can carry out experiments such as cell proliferation and differentiation, and can observe the changing process of cell samples in real time like watching a movie.

The design of scientific experimental cabinets embodies a lot of wisdom and hard work of scientists and engineers, and each experimental cabinet can be regarded as a comprehensive laboratory. As the first scientific experimental module of China Space Station, the space experimental module is equivalent to moving the laboratory into space.

Doing experiments and collecting plant samples in space.

The space experiment began.

In the capillary effect experiment demonstrated by Chen Dong, without the constraint of gravity, the liquid level in the thin tube keeps rising, which is much faster than the same demonstration on the ground. In the demonstration of interesting drinking water in space, Liu Yang successfully drank the drinks in the bag with a 2-meter-long straw?

Wonderful experiments show the special space environment, which makes students feel the microgravity environment intuitively.

? I planted lettuce in Tiangong No.2, and recently I tasted the lettuce grown by Cai Xu Zhe himself. ? Chen Dong personally operates, collects Arabidopsis thaliana samples and freezes them in the growth state in space.

Before the experiment, Chen Dong put Arabidopsis thaliana in a scientific glove box. Open the growth box of Arabidopsis thaliana, and plant Arabidopsis thaliana with different flowering periods controlled by genes in each planting hole. The flowering Arabidopsis flowers are white and very small.

Subsequently, Chen Dong put the cut Arabidopsis thaliana into a freezing tube. According to Chen Dong, after all samples are collected, they will be stored in a low-temperature storage area at MINUS 80 degrees Celsius. When they return to earth, these samples will be handed over to scientists for study.

In the experiment, Chen Dong wears mixed reality glasses, so she can finish her work more easily and efficiently, and the students in the ground class can better observe the experiment from Chen Dong's point of view.

Liu Yang shows the rice in the experimental cabinet of life ecology. After more than 70 days of growth, rice has changed from full seeds to rice plants. However, they look stagger. This is mainly because without the stimulation of gravity, the growth direction of rice has become chaotic.

? Im really looking forward to it. We can harvest our own rice in the space station in the future. Perhaps, on the future moon and Mars, Academician Yuan Longping's dream of enjoying the cool under the grain can also be realized. ? This is the common wish of astronauts.

The interaction between heaven and earth is full of fun.

Are you online? Tiangong classroom? In the questioning session, students from the ground class raised many interesting questions, which were answered by three astronauts from China Space Station.

First of all? Classroom question and answer. The students raised several questions related to the space lecture.

? The cabinets in the life ecology laboratory are like space hotels for animals and plants. What kind of animals and plants will stay in space hotels in the future? ?

? In addition to Arabidopsis thaliana and rice, zebrafish, nematodes and other animals and plants can also be cultivated in the life ecology experimental cabinet to see if they are in space. Live broadcast? Just get used to it. ?

? There is no up, down, left or right in space, so we can't feel gravity. Why can the roots of rice fall into the soil? ?

? Without the guidance of gravity in the space station, most of the roots of plants will stick to the soil, because plants have hydrotropism besides gravity. ?

? Will you feel bumpy in the space station? ? How many colors do you see on the earth in the universe? ? Students also show their curiosity about space and space flight.

? There is no influence of gravity and airflow in space, and there are many devices in the space station to ensure stable operation, so our space home is very stable and does not feel bumpy. ?

? The space station orbits the earth in about 90 minutes, so from our point of view, the color of the earth is not immutable. When the sun shines on the earth, the blue ocean and the yellow-green land are clearly visible. When there is no sun, the city lights decorate the earth.

Space teaching has passed quickly in the interaction between heaven and earth, and the teaching is coming to an end.

? Soon, our Meng Tian experimental module will be launched into orbit, and then we will witness the historical moment when the China Space Station is completely built. We very much hope that students can build our space home better in the future! ? Three astronauts said goodbye to their classmates in front of the camera.