Actin
Absolute Zero
Quark
Element
Acid Precipitation
Atom
Amino Acid
Compund
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.
An elementary particle and a fundamental constituent of matter.
A species of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, Z).
One of the proteins into which actomyosin can be split; can exist in either a globular or a fibrous form.
A chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition.
A class of organic compounds containing an amino group and a carboxylic acid group
The smallest component of an element having the chemical properties of the element
