Term | Definition |
Matter | Anything that has mass and takes up space. |
Mass | Describes the amount of matter in an object. |
Weight | A measure of the gravitational force on an object. |
Volume | The amount of space that an object takes up, or occupies. |
Density | A measure of the amount of mass that is in a given volume. |
Physical property | A characteristic of a substance that can be observed and measured without changing the identity of the substance. |
Chemical property | Describes the substance's ability to change into a new substance with different properties. |
Physical change | A change that affects one or more physical properties of a substance. |
Chemical change | Occurs when one or more substances changes into entirely new substances with different properties. |
Law of conservation of mass | States that in ordinary chemical and physical changes, mass is not created or destroyed but is only transformed into different substances. |
Atom | The smallest unit of an element that maintains the properties of that element. |
Element | Made up of one or more of the same kind of atom chemically combined. |
Compound | Made up of different kinds of atoms chemically combined. |
Mixture | Contains a variety of elements and compounds that are not chemically combined with each other. |
Pure substance | Elements and compounds. |
Heterogeneous | one that does not have a uniform composition. |
Homogeneous | One that has a uniform composition. |
Solid | Has a definite volume and shape. |
Liquid | Has a definite volume but not a definite shape |
Gas | Does not have a definite volume or shape. |
Freezing | The change in state in which a liquid becomes a solid. |
Melting | The change in state in which a solid becomes a liquid. |
Evaporation | The change in state in which a liquid becomes a gas |
Boiling | The rapid change from a liquid to a gas |
Condensation | The change of a gas to a liquid. |
Sublimation | The change of a solid state directly into a gas |
Deposition | The change in state from a gas directly to a solid. |