Term | Definition |
matter | everything that has mass and takes up space |
element | the ingredients that make up all other substances. cant be broken down into other substances |
metals | good conductors of electricity and heat. can bend without breaking. most have gray color |
nonmetals | do not conduct heat or 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 |
liquid | Definite volume but not shape, particles can move past each other. Takes shape of container |
solid | Has a definite shape and volume. Particles are very close together, and don’t move past each other. Keeps shape |
gas | No definite volume or shape. Particles spread out evenly and take shape of container. Can be squeezed into smaller volume |
plasma | Like a gas, but conducts electricity like a metal. Occurs with high temps or electric charge. |
melting point | When solid to liquid or liquid to solid. Same temp as freezing point. |
EVAPORATION | When liquids become a gas. |
CONDENSATION | When gas become a liquid. Gas particles touch a cold surface and the temperature drops |