Term | Definition |
Matter | Anything that has mass and occupies space. |
Substance | A single kind of matter that is pure and has specific properties. |
Chemical Property | A characteristic of a pure substance that describes it's ability to change into a different substance. |
Atom | The basic particle form which all elements are made. |
Molecule | A particle made of two or more atoms bonded together. |
Chemistry | The study of the properties of matter and how matter changes. |
Chemical Formula | A formula that gives the elements in a compound and the ratio of atoms. |
Physical Property | A characteristic of a pure substance that can be observed without changing it into another substance. |
Mixture | Two or more substances that are mixed together but not chemically combined. |
Element | A pure substance that cannot be broken down into other substances by chemical or physical means. |
Heterogeneous Mixture | A mixture in which pure substances are unevenly distributed throughout the mixture. |
Compound | A pure substance made of two or more elements chemically combined. |
Solution | Example of a homogeneous mixture; forms when a substance dissolves. |
Weight | A measure of the force of gravity on an object. |
Density | The measurement of how much mass of a substance is contained in a given volume. |
Mass | A measure of how much matter is in an object. |
Volume | The amount of space that matter occupies. |
Physical Change | A change in a substance that does not change it's identity. |
Energy | The ability to do work or cause change. |
Endothermic Change | A change in which energy is taken in. (Gets colder). |
Chemical Change | A change in which one or more substances combine or break apart to form new substances. |
Temperature | A measure of the average energy of motion of the particles of the substances. |
Thermal Energy | The total energy of all the particles in an object. |
Exothermic Change | A change in which energy is given off. (Gets hotter). |
Law of conservation of mass | The principal that the total amount of matter is neither created nor destroyed during any chemical or physical change. |