1. In chemistry class studied various substances and their interactions.
2. Chemistry is divided into 2 General parts - organic and inorganic.
3. Organic chemistry studies fats, proteins, and carbohydrates.
4. Biochemistry — the science of the chemical composition of living cells and organisms, as well as the underlying chemical processes.
5. Dmitry Mendeleev Russian scientist who created the periodic table of elements.
6. the properties of chemical elements depend on the atomic number.
7. A chemical reaction is the interaction of two or more substances.
8. It depends on the physical state of body: solid body, liquid and gas.
I think we can vote for the Moscow Underground. The Moscow Metro is recognized as the most beautiful underground railway system in the world. The Metro opened in 1935 and now it is the second largest underground railway system in the world. The Moscow underground has 177 stations and 7 million people travel on the Metro every day. The Moscow Metro map is like the London Tube map: it does not show true distances, it only shows how to get from one place to another. The Moscow Metro has been around for more than 70 years and has become part of our culture and history. To many, the Moscow Metro represents all that is great and beautiful in Russia.
P.S. надеюсь понятно:)