We say the cause of perfume disappearing is evaporation. Evaporation gets blamed for a lot of things people forget to put the top on. I am not sure how clouds get formed. But the clouds know how to do it, and that is the important thing. Cyanide is so poisonous that one drop of it on a dog's tongue will kill the strongest man.
Thunder is a rich source of loudness.
Isotherms and isobars are even more important than their names sound. It is so hot in some parts of the world that the people there have to live other places. Our new teacher told us all about fossils. Before she came to our class, I didn't know what a fossil looked like. Pavlov studied the salvation of dogs.