Matching Pairs Bio Matching 2Online version Bio Matching 2 by Lewis Morris 1 Absolute Zero 2 Element 3 Quark 4 Amino Acid 5 Acid Precipitation 6 Actin 7 Compund 8 Atom The smallest component of an element having the chemical properties of the element A class of organic compounds containing an amino group and a carboxylic acid group A chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition. A species of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, Z). An elementary particle and a fundamental constituent of matter. The lowest theoretically attainable temperature (at which the kinetic energy of atoms and molecules is minimal) Rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water. One of the proteins into which actomyosin can be split; can exist in either a globular or a fibrous form.