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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. |