ANSWER ALL QUESTIONS TO COURSE WORK ENVIRNOMENTAL SCIENCE Coursework

ANSWER ALL QUESTIONS TO COURSE WORK ENVIRNOMENTAL SCIENCE - Coursework Example An example is the melting if the sea ice in the Arctic and glaciers as a result of global warming. Atom is delineated as a building block of any matter. It joins together the molecules which forms most of the objects around us. They are composed of protons, electrons and neutrons. The protons and neutrons are at the centre of the atoms called nucleus while the electrons orbit the nucleus. Protons have a positive charge; electrons have a negative charge while the neutrons don’t have any charge. Isotopes refer to the atoms with different numbers of neutrons. They are mainly denoted by different elementary symbols that are preceded by the mass number or the numbers of neutrons and protons in the atoms. For instance 2H (deuterium) is an isotope of the element hydrogen with a single neutron within the nucleus as opposed to the common 1H. Ions are atoms with extra electrons or missing electrons. When there is one or two electrons missing, there will be a positive charge while when there is an extra electron there will be a negative charge. (Wright, & Broose, 2011) The movement of electrons happens in the single covalent bonds. Two atoms of hydrogen for instance share their electrons when they bind together in order to form the hydrogen gas. An example is the formation of human blood, the ocean water and various metal alloys. (Wright, & Broose, 2011) Proteins- Made up of long chains of different organic molecules referred to as amino acids. The organisms combine up to 20 different amino acids into long chains. Proteins forms the largest part of organisms matter and perform different functions of the living changes. Animals for instance use proteins in the generation of hair, skin, tendons and muscles. Some proteins helps in storage energy, others facilitate transportation of substance, defends the organism against foreign attackers while others act as hormone, serve as enzymes. Nucleic acids – It facilitates directing of production of proteins. The