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3.2 Vocab
| Term | Definition |
|---|---|
| SOLID | Has a definite volume or shape. Particles are very close together, and don’t move past each other. Keeps its shape. |
| LIQUID | Has a definite volume but not shape. Particles can move past each other. Takes shape of container. |
| GAS | No definite volume or shape. Particles spread out evenly and take shape of container. Can be squeezed into a smaller volume. |
| PLASMA | Like a gas, but conducts electricity like a metal. Occurs with high temps or electric charge. |
| MELTING POINT | Solid to liquid or liquid to solid. Same temperature as freezing point. |
| EVAPORATION | When liquids become a gas. |
| CONDENSATION | When gas becomes a liquid. Gas particles touch a cold surface and the temperature drops. |
| BOILING POINT | The temperature at which evaporation occurs. |
| MATTER | Everything that has mass and takes up space. |
| ELEMENT | The ingredients that make up all other substances. Can't be broken down into other substances. |
| METALS | Good conductors of electricity and heat. Can bend without breaking. Most have a gray color. |
| NONMETALS | Do not conduct heat / electricity very well. May be a gas or a solid. |
| SEMI‐METALS | Sometimes like metals and sometimes like nonmetals. |
| ATOM | The smallest part of an element that still acts like that element. |
| ATOMIC THEORY | States that everything is made of atoms. |
| COMPOUND | A type of matter made of two or more elements. |
| MOLECULE | Smallest particle of a compound that still acts like that compound. |
| PROTON | Positive charge. Found in the nucleus. |
| NEUTRON | No charge. Found in the nucleus. |
| ELECTRON | Negative charge. Orbits the nucleus. |