Paper burning boat

Paper burning boat

Zhejiang Xiaoyun County Experimental State Xiaowuyi Ban Su Yurui

"Ding zero, the class bell rang, and the teacher walked into the classroom with a big step, but it was not a textbook, but a tripod, an alcohol lamp, a paper boat, a box of matches, and A cup of water, I thought: "Is the teacher wrong, what is the use of these scientific equipment? At this time, Teacher Yan said loudly: "Today we are going to make an interesting experiment - burning paper boats." "The students listened and talked about it. Some said: "The paper will burn when it hits the fire. This is a matter of righteousness. What medicine is sold in the teacher's gourd!" "Some said: "There must be some mysteries in this! "Listen to what they said, I am even a second monk - can not touch the head.

The experiment started. The teacher put the paper boat on the tripod first. Then, the alcohol lamp was ignited and placed under the tripod. The "fire tongue" greedily added the bottom of the boat. After a while, a steam of water appeared. The students all had big copper bell-like eyes and looked at Zhu Tianyi. I saw her eyes screaming and screaming, and she was very curious. The paper boat seems to be wearing a fireproof clothing. How to burn it is still safe. After a long time, the water in the boat actually boiled. I was relieved. At this time, the teacher asked us what mystery is there? The teacher invited several classmates, but they all supported me and could not tell. Teacher Yan said: "The paper boat has a certain temperature, but because there is water in the boat, when the paper boat is warmed on the alcohol lamp, the water in the paper absorbs a lot of heat, and the water vapor evaporates the hot air, so even though the paper The boat frame is still on the flame, and the temperature of the burning is still not reached. If the water in the paper boat is dried, the paper boat will burn." After listening to these, I suddenly realized.

The mystery of science is not easy, but as long as we look closely, we can unlock many scientific mysteries.

Instructor: Yan Lixue