What little experiment have you done? Before writing, I would like to introduce you. You can organize the main information of the small experiment as follows with the help of charts:

Name of the experiment: Let the eggs float in the water. Experimental preparation: eggs, glass bowls, water, salt and baking soda. Experimental process: Step one, pour water into a glass bowl.

Step two, put the egg into the water and the egg sinks to the bottom. Step three, add baking soda to keep the eggs from floating. The fourth step is to add salt. With the increase of salt, eggs will float. Experimental results: Salt water can make eggs float on the water.

The scientific experiment is as follows:

First, candles absorb water.

Prepare a candle, a bottle of paint, a bowl of clear water, a tray and a cup, then pour some paint into the clear water, stir to dye it, prevent the candle from floating on the water, light the candle with a lighter, and cover the candle with a cup when the fire gets bigger. When the fire goes out gradually, the liquid level in the cup will eventually rise.

In fact, this is because the atmospheric pressure outside is greater than the atmospheric pressure inside the cup, which leads to the rise of the liquid level. Because I didn't learn the relevant knowledge at that time, I found it very interesting, so I did it again.

Second, "Pharaoh's Snake"

I saw this experiment on the Internet. I thought it was a little magical, so I followed it into the laboratory with the teacher's consent. First, prepare a basin of sand, a bottle of alcohol, sugar, baking soda and matches; Then pour alcohol into the sand, then add sugar and baking soda to the sand in turn, and then ignite the mixture with a lit match.

You can see a mass of black things coming out of the sand, which is the "Pharaoh snake". This experiment is similar to an experiment in high school. Adding concentrated sulfuric acid to white sugar will also lead to a similar situation, but the reasons for these two experimental phenomena are different.