Science is everywhere around us. As long as we observe carefully, we can solve the mystery.

When I was a child, I heard that tomatoes from various sources can generate electricity, but I never understood why tomatoes can generate electricity when I was a child. Today, I learned how tomatoes generate electricity by reading books and surfing the Internet.

It turns out that the liquid in the tomato is acidic, and there are a lot of electronic groups-H ions in the acidic medium. In this medium, different metals will have different properties, some will gain electrons and some will lose electrons. As a result, there are electrons moving freely in the acidic medium, so that in the closed-circuit system, a current is formed.

So I did an experiment. First, I prepared two tomatoes, two pieces of copper, two pieces of zinc, a wire and an ammeter. First of all, with my father's help, I welded a piece of zinc and a piece of copper on both ends of the wire with an electric soldering iron. Separate the tomatoes at a certain distance, insert a piece of zinc and a piece of copper on each tomato and weld them together. Insert another piece of copper and a piece of zinc into the tomato, connect the anode of the galvanometer with the copper on one tomato, and then connect the cathode of the galvanometer with the zinc on the other tomato. The galvanometer shows that there is current passing through, and the experiment is successful!

Today, I learned why tomatoes can generate electricity by reading books, searching online and doing experiments. This also leads me to a conclusion that science is everywhere around us. As long as we observe attentively and do experiments diligently, we can make good use of science to facilitate our lives.