| A | B |
|---|
| Average Atomic Mass | The ratio of the average mass of atoms of an element (from a given source) to 1/12 of the mass of an atom of carbon-12.,  |
| Chemical Compounds | Combinations of two or more elements also known as Atoms,  |
| Constructive Interference | The interference that occurs when two waves combine to make a wave with a larger amplitude.,  |
| Electrical Energy | The energy of moving electrical charges.,  |
| First Law of Thermodynamics | The law expresses that energy can be transformed, i.e. changed from one form to another, but cannot be created nor destroyed.,  |
| Halogen Family | The elements in Group 17 of the periodic tale.,  |
| Instantaneous Speed | A scalar measure of the rate of movement of a body expressed either as the distance traveled divided by the time taken (average speed) or the rate of change of position with respect to time at a particular point (instantaneous speed). It is measured in meters per second, miles per hour, etc.,  |
| Locomotion | The movement of the body from place to place.,  |
| Molecular Motion | How molecules move in a gas very fast, and a solid very slow, molecules are always in motion,  |
| Output Force | The force exerted on an object by a machine.,  |
| Power | the rate of doing work measured in watts (= joules/second),  |
| Second Law of Thermodynamics | Any of three principles variously stated in equivalent forms, being the principle that the change of energy of a thermodynamic system is equal to the heat transferred minus the work done (first law of thermodynamics), the principle that no cyclic process is possible in which heat is absorbed from a reservoir at a single temperature and converted completely into mechanical work (second law of thermodynamics), and the principle that it is impossible to reduce the temperature of a system to absolute zero in a finite number of operations (third law of thermodynamics).,  |
| Strong Base | Commonly thought of as an aqueous substance that can accept hydrogen ions; that completely dissociates into ions in solution.,  |
| Tyndall Effect | The phenomenon in which light is scattered by very small particles in its path,  |
| Work | The moving of an object oer a distance by a force.,  |
