| A | B |
|---|
| nucleus | the center of the atom |
| electron | the negatively charged part of an atom |
| proton | the positively charged part of an atom |
| matter | what all things are made of; anything that has mass and takes up space (volume) |
| neutron | the part of the atom without a charge |
| temperature | a measure of the rise and fall of heat |
| molecule | the smallest particle or substance that is still a substance, having all properties of that substance |
| atom | small particles comprising molecules |
| solid | a state of matter where molecules may only jiggle |
| liquid | a state of matter where molecules slide and glide over each other taking the shape of their container |
| gas | a state of matter where the molecules are moving rapidly bumping into each other and taking the shape of their container |
| mixture | a combination of two or more substances that do not lose their identifying characteristics when combined |
| compound | when two or more elements combine to form a new substance |
| solution | a mixture in which particles of different substances are mixed evenly throughout |
| mass | measure of the amount of matter something contains |
| volume | amount of space that matter takes up |
| physical properties | characteristics that can be seen or measured without changing the material |
| chemical properties | characteristics that can only be seen when the material changes and new materials are formed |
| states of matter | solid, liquid or gas |
| element | any material made up of only one kind of matter |
| chemical symbol | one or two letters that stand for the name of an element |
| substances | class of matter made up of elements and compounds |
| chemical formula | group of symbols that shows the kind and number of each element in a single unit of a compound |
| physical change | change in size, shape or state of matter with no new matter being formed |
| chemical change | any change in matter that results in one or more kinds of matter being formed |
| chemical reaction | the process inwhich one or more substances are changed into one or more different substances |
