Английский язык: Аннотирование и реферирование текста

249 radiation, and then decide what source of energy the future holds that will benefit not only all living things, but also the environment. Текст 2. Electron Theory and Atoms Everybody knows about atoms and electrons don't they? Well we could skip this part but of course we won't because you will likely learn something new. Electron theory states all matter is comprised of molecules, which in turn are comprised of atoms, which are again comprised of protons, neutrons and electrons. A molecule is the smallest part of mat- ter which can exist by itself and contains one or more atoms. If you turn on a light switch for example you will see the light bulb (globe) glow and emit light into the room. So what caused this to happen? How does energy travel through copper wires to light the bulb? How does energy travel through space? What makes a motor turn, a radio play? To understand these processes requires an understanding of the basic principles. For the light to glow requires energy to find a path through the light switch, through the copper wire and this movement is called electron flow. It is also called current flow in electronics. This is the first important principle to understand. The word matter includes almost everything. It includes copper, wood, water, air ... virtually everything. If we were able to take a piece of matter such as a drop of water, divided it by two and kept dividing by two until it couldn't be divided any further while it was still water we would eventually have a molecule of water. A molecule, the smallest particle which can exist, of water com- prises two atoms of Hydrogen and one atom of Oxygen – H 2 O. An atom is also divisible – into protons and electrons. Both are electrical particles and neither is divisible. Electrons are the smallest and lightest and are said to be negatively charged. Protons on the other