potato

Today, the teacher gave us a lively and interesting experimental class titled "Will the potato sink or simmer in the water. The teacher gave us an experiment to put two different sizes of potatoes in two water-filled leeches. Before letting the teacher let us first guess which is Shen, which Fufu students will guess that the small will float, the big one is Shen. As a result, the teacher found that the opposite was true. And putting them in the same raft is two things, one is sinking, and the other is that Dufu students are very curious. In the end we all said that it must be related to water. The teacher asked us to prove through experiments.

The teacher asked us to take some of the water from the sputum, and then put it on the iron piece to burn the alcohol lamp. After the water in the leeches was burned, there was a layer of white on the iron piece, but not on the other. The teacher also asked us to put this white thing on the tongue with a hand. As a result, everyone shouted, "Oh, it is salty." "Teacher, this is salt." The teacher agreed with us and praised us.

Through this experiment, we understand that the original salt water can make the potatoes float. To prove this, the teacher then let us do it ourselves. In the process of doing it, we found that the salt should not be too small, and only a certain concentration can be reached to make the potato float. Why does salt water make them float? The teacher gave us the weight of salt water and water, and found that the salt water was much heavier, and the more salt, the heavier the weight. The heavier the weight, the heavier the buoyancy. Therefore, the potato can float.

Sixth grade: 1743790233