Convection experimental material and experimental method

Abstract

The invention discloses a convection experiment material and an experiment method. The experiment method comprises the following steps of performing an experiment by using small pieces of a 0.08 mm PET material laser silver film and ethylene glycol liquid. The convection motion experiment phenomenon is easy to observe, the experiment device, operation and observation are simple, and the experiment material and the experiment container are safe to heat; the small film pieces move in the liquid along with flowing of the liquid, the small pieces are good in light reflection, and the movement has ornamental value; in the experiment, the alcohol lamp is heated in the middle of the bottom of the container, and the small pieces rise at the center of the bottom of the container, disperse around near the liquid surface, descend around the container and gather towards the middle near the bottom of the container, so that an intuitive and close natural convective motion phenomenon is formed, and students can easily find the rule of convective motion by themselves; according to the experiment, convection which is not limited by the container in the flowing direction can be observed, continuous circulation motion of liquid under a certain condition can be observed, the three-dimensional convection phenomenon of a space can be observed, and objects in different shapes can be put into the container to explore convection in a special environment.

Description

technical field [0001] The invention relates to the field of convection experiments, in particular to a convection experiment material and an experiment method. Background technique [0002] Convective motion is the basic way of material motion in nature, and exploring the law of convective motion is one of the important contents of science and physics teaching in primary and secondary schools. At present, there are mainly two convection test methods: 1. Add water and dyeing agent into the return-shaped tube, heat the bottom of one side of the return-shaped tube with an alcohol lamp, and then observe the flow of the dyeing agent. In the experiment, the flow of water in the circular tube was clear before the dye was evenly diffused, but the spatial shape of the circular tube was far from that of the natural environment. It was difficult for primary and junior high school students to understand the flow of water in the circular tube independently of the natural environment. T...

AI Technical Summary

Problems solved by technology

In the experiment, the smoke will gradually spread during the movement, so that the rising of the smoke is clear, and the observation effect of the falling is poor. During the exploration, some students will mistakenly think that the falling of the smoke is mainly due to the collision between the smoke and the top of the container

There has been little progress in improving this experiment for a long time

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