| A | B |
| Reactant | Substance(s) that enter(s) chemical changes. Reactants are on the left side of the arrow in chemical equations. |
| Product | The result of chemical changes. Products are on the right side of the arrow in chemical equations. |
| Dissolve | Partially or completely breaking the chemical bonds that form a solute by adding the solute to a solvent. |
| Solute | A substance (usually a solid) that is dissolved by a solvent |
| Solvent | A substance (usually a liquid) that dissolves a solute |
| Chemical Equation | A representation of a chemical change. It includes the symbols of the chemicals involved and the number of molecules or atoms that are involved. |
| Subscript | A little number at the bottom of elemental symbols that represents the number of atoms in a diatomic molecule or the ratio of atoms in a compound. |
| Coefficient | A large number in front of a chemical symbol that represents the number of atoms or molecules in a reaction. |
| Percent Error | The percentage of error between an experimental value and the known value. It is calculated by dividing the difference between the real and experimental values by the real value, and then multiplying by 100. |
| Phase Change | A physical change from one phase to another that is achieved by adding or subtracting energy |
| Solid | Phase of matter that has a definite shape and volume |
| Liquid | State of matter that has a definite volume, but not a definite shape |
| Gas | Phase of matter that has neither a definite shape nor a definite volume |
| Plasma | Very high energy phase of matter |
| Seismic waves | Shock wave produced by a earthquake |
| Inner core | Solid, innermost layer of the earth |
| Outer core | Liquid layer of the earth surrounding the inner core |
| Mantle | Layer of the earth that extends from the bottom of the crust to the earth's core |
| Moho | Boundary between's the earth's outermost layer (crust) and the mantle |
| Crust | Thin, outermost layer of the earth |
| Lithosphere | Part of the Earth's surface covered by land; solid, topmost part of Earth |
| Asthenosphere | Layer of the Earth directly beneath the lithosphere |
| Plasticity | Ability of a solid to flow, or change shape |
| Deformation | In geology, any change in the original shape or volume of rocks |
| Fracture | Break or crack |
| Fault | A break or crack along which rocks move |
| Fold | A bend in rock |
| Anticline | An upward fold in rock |
| Syncline | A downward fold in rock |
| Isostasy | The balancing of the downward force of the crust and the upward force of the mantle |
| Plateau | A large area of flat land that is raised high above sea level and that consists of horizontal rock layers |
| Dome | A raised area shaped roughly like the top half of a sphere, often formed by magma pushing upward on the rock layers above it |
| Hanging wall | The block of rock above a fault |
| Foot wall | The block of rock below a fault |
| Stress | The forces that push and pull on the Earth's crust, causing deformation |