What is the difference between electricity and lightning

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Science The controversial sale of 'Big John,' the world's largest Triceratops. As ice crystals high within a thunderstorm cloud flow up and down in the turbulent air, they crash into each other. Small negatively charged particles called electrons are knocked off some ice and added to other ice as they crash past each other. The top of the cloud becomes positively charged while the base of the cloud becomes negatively charged.

Once the negative charge at the bottom of the cloud gets large enough, a flow of negative charge called a stepped leader rushes toward the Earth. The positive charges at the ground are attracted to the stepped leader, so positive charge flows upward from the ground. When the stepped leader and the positive charge meet, a strong electric current carries positive charge up into the cloud. This electric current is known as the return stroke. We see it as the bright flash of a lightning bolt.

Thunder and lightning occur at roughly the same time although you see the flash of lightning before you hear the thunder. In the end, if someone asked me "what kind of lightning is electricity? What is a science fact? Something that is proven true? This really is not how science works. Second, I am not fond of the term "electricity" either - what exactly is this? The site claims there are two kinds of electricity - static and current. I guess this ok since the definition of electricity is not too clear to me.

Here is a table from that site: Here they define current electricity as a steady flow of electrons.