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science test
Question | Answer |
---|---|
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 elementatomiv. |
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. |
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 | |
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 gas |
condensation | When gas becomes a liquid. Gas particles touch a cold surface and the temperature drops. |
boling point | the temperature at witch evaporation occurs. |
mixture | |
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 |