| A | B |
|---|
| Atom | building block of matter |
| centimeter | cm, measures length |
| chemical change | change of one substance into another substance |
| compound | two or more different types of atoms bonded together |
| conclusion | last step of the scientific method, where you answer the problem statement |
| condensation | when a gas becomes a liquid |
| constants | parts of the experiment that stay the same |
| control | standard for comparison |
| cubic centimeter | measurement for (solid) volume |
| density | mass per unit volume, how closely packed particles are |
| dependent variable | variable forced to change, responding variable |
| electron | negatively charged part of an atom |
| element | a substance that cannot be broken down into simpler substances, made of only one type of atom |
| evaporation | a substance changes from aliquid to a gas at the surface of the liquid |
| gas | matter with nodefinite volume and no definite shape, molecules are far apart and have alot of energy |
| graduated cylinder | measures liquid volume |
| gram | g, measures mass |
| g/cm3 | unit of measure of denisty |
| graph | visual representation of data |
| hypothesis | an educated guess |
| independent variable | manipulated variable that the experimenter changes |
| length | a measure of the distance between two points |
| liquid | matter that has a definite volume but no definite shape, takes the shape of its container, particles can flow |
| mass | the measure of the amount of matter in an object |
| meter | unit of metric measure of length (m) |
| metric ruler | measures length |
| milliliter | measures volume (mL) |
| mixture | a combination of 2 or more substances not chemically combined, that can be separated by a physical change |
| molecule | a group of atoms held topgether by chemical bonds |
| neutron | atomic particle in the nucleus of an atom that has no charge |
| Newton | measure of weight (N) |
| observation | anythign you see, feel, touch, measure - using your senses to gather information |
| balance | masuring device used to measure mass |
| physical change | A change in the size, shape, color or state of matter |
| proton | positively charged particle in teh nucleus of an atom |
| qualitative observation | an observation made using your senses |
| quantitative observation | an observation made using measurements |
| scientific method | a process used to solve a problem |
| second | (sec) measurement of time |
| solid | matter that has a definite shape and a definite volume |
| sublimation | process of a solid changing directly to a gas without becoming a liquid first |
| theory | a logical explanaion for how things work, backed by the results of an experiment |
| thermal expansion | a characteristic of almost all materials that causes it to expand when heated |
| variable | anything that changes in an experiment |
| volume | the amount of space an object occupies |
| weight | a measure of the force of gravity on an object |
