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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 |