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The relationship between human or animal survival and plants
Not long ago, many plants were added to grandma's house, and bonsai was placed at the door, living room and balcony. I said to my grandmother, "Our home has become a botanical garden. Why are there so many plants? " Grandma smiled and said, "Plants can make oxygen and purify the air. No one can live without them. " People or animals cannot live without plants? Why can't people or animals live without plants? I'll be skeptical. Decided to do a few small experiments to solve this problem.
On Sunday, I asked my brother to go to the garage to catch two mice. These two poor little mice will be my experiments. They kept struggling, their little round eyes staring at me. I put the first mouse in a big fish tank, and sealed the mouth of the fish tank with plastic wrap, lest the air in the bottle communicate with the outside air. I watched carefully and saw the little mouse scurrying along the cylinder wall and around the bottom. Hey, isn't the mouse alive and well? Isn't what grandma said true? However, in a few minutes, I saw the little mouse winding slower and slower until it was stagnant and dying. Suddenly, I gently removed the disposable plastic wrap, grabbed the first mouse, put the second mouse in, and moved into four pots of leafy plants. Then gently cover with disposable plastic wrap. I kept patting the fish tank, only to see the little mouse scurrying about in panic, and it took a long time to die. This experiment proves that plants can transport the oxygen that animals need.
In order to further prove the dependence of humans and animals on plants, I came to my mother's original factory. The air there is full of dust noise, which makes me cough. I feel very uncomfortable. Then, I ran to a bamboo forest in Guiyuan. It is a place with fresh air, and I feel extremely refreshing. This experiment proves that plants can purify the air and make people breathe smoothly.
These two experiments prove that the survival of human beings and animals is closely related to plants. How scientific is this? Our scientific and technological team went to the library to consult many scientific and technological books, and also went to the electronic reading room of the school for online inquiry, and summarized the following points: ① People must rely on plants to provide oxygen, and only plants can make oxygen. If a person doesn't eat or drink for a few days and still has a breath, he may die if he doesn't breathe for a few minutes. Oxygen is the first need of human life activities! An adult breathes about 20,000 times a day, inhaling 0.75 kg of oxygen and exhaling 0.9 kg of carbon dioxide. (2) Breathing of animals and plants and burning of substances also consume oxygen and release carbon dioxide. So, isn't there more oxygen in the air every day? Don't! The reason why there has never been such a crisis between heaven and earth is that plants are both "factories" of natural oxygen and "broad markets" of carbon dioxide. According to statistics, 1 hectare of broad-leaved forest can produce 750 kilograms of oxygen and eat 1 1,000 kilograms of carbon dioxide every day during the growing season. Therefore, as long as there are 6.5438+10,000 square meters of trees, it can supply 1000 people's oxygen demand and absorb exhaled carbon dioxide. Because there are plants that constantly supplement oxygen, the oxygen in the air can be kept basically constant. On the contrary, if there are no plants, the oxygen on the earth can be used up in about 500 years.
Plants are closely related to our human and animal lives. Here, we call on people in the whole society to stop cutting down plants and make them our best friends.