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Chapter 3
| 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. |
| Condansation | 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 | the smallest part of an element that still acts like that element |
| 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 |
| Mixture | Two or substances that mix together but each keeps its own identity |
| Solution | A mixture where substance spreads out evenly and will not settle |
| Solute | The substance being dissolved |
| Solvent | What the substance is dissolved in |
| Solubility | A way to measure how much a material dissolves into another |